diff --git a/arch/arm/src/kinetis/kinetis_usbdev.c b/arch/arm/src/kinetis/kinetis_usbdev.c
index cf91a616f8..7596a7e93f 100644
--- a/arch/arm/src/kinetis/kinetis_usbdev.c
+++ b/arch/arm/src/kinetis/kinetis_usbdev.c
@@ -1868,7 +1868,7 @@ static void khci_eptransfer(struct khci_usbdev_s *priv, uint8_t epno,
  * Name: khci_ep0nextsetup
  *
  * Description:
- *   This function is called (1) after sucessful completion of an EP0 Setup
+ *   This function is called (1) after successful completion of an EP0 Setup
  *   command, or (2) after receipt of the OUT complete event (for simple
  *   transfers).  It simply sets up the single BDT to accept the next
  *   SETUP commend.
diff --git a/arch/mips/src/pic32mx/pic32mx-usbdev.c b/arch/mips/src/pic32mx/pic32mx-usbdev.c
index 82b3185181..a0bd850461 100644
--- a/arch/mips/src/pic32mx/pic32mx-usbdev.c
+++ b/arch/mips/src/pic32mx/pic32mx-usbdev.c
@@ -1785,7 +1785,7 @@ static void pic32mx_eptransfer(struct pic32mx_usbdev_s *priv, uint8_t epno,
  * Name: pic32mx_ep0nextsetup
  *
  * Description:
- *   This function is called (1) after sucessful completion of an EP0 Setup
+ *   This function is called (1) after successful completion of an EP0 Setup
  *   command, or (2) after receipt of the OUT complete event (for simple
  *   transfers).  It simply sets up the single BDT to accept the next
  *   SETUP commend.
diff --git a/binfmt/binfmt.h b/binfmt/binfmt.h
index 9046cc9cf7..b4e7ee08ef 100644
--- a/binfmt/binfmt.h
+++ b/binfmt/binfmt.h
@@ -82,7 +82,7 @@ EXTERN FAR struct binfmt_s *g_binfmts;
  *   bin      - Load structure
  *
  * Returned Value:
- *   Zero (OK) on success; a negater errno value on failure
+ *   Zero (OK) on success; a negated errno value on failure
  *
  ****************************************************************************/
 
@@ -106,7 +106,7 @@ int dump_module(FAR const struct binary_s *bin);
  *   argv     - Argument list
  *
  * Returned Value:
- *   Zero (OK) on success; a negater errno value on failure.
+ *   Zero (OK) on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
diff --git a/binfmt/binfmt_copyargv.c b/binfmt/binfmt_copyargv.c
index c3f3dbcc08..d06865b51d 100644
--- a/binfmt/binfmt_copyargv.c
+++ b/binfmt/binfmt_copyargv.c
@@ -77,7 +77,7 @@
  *   argv     - Argument list
  *
  * Returned Value:
- *   Zero (OK) on sucess; a negater erro value on failure.
+ *   Zero (OK) on success; a negated erro value on failure.
  *
  ****************************************************************************/
 
diff --git a/configs/hymini-stm32v/README.txt b/configs/hymini-stm32v/README.txt
index 9a2e0bfdb0..7b7fa26030 100644
--- a/configs/hymini-stm32v/README.txt
+++ b/configs/hymini-stm32v/README.txt
@@ -37,7 +37,7 @@ ST Bootloader
 
   A flash utility must be used on your development workstation to upload / flash
   a firmware image. (The 'stm32flash' open source tool, available at
-  http://stm32flash.googlecode.com/ has been used sucessfully).
+  http://stm32flash.googlecode.com/ has been used successfully).
 
 LEDs
 ====
diff --git a/configs/stm32butterfly2/src/stm32_boot.c b/configs/stm32butterfly2/src/stm32_boot.c
index 928b558633..5ceb5d15fa 100644
--- a/configs/stm32butterfly2/src/stm32_boot.c
+++ b/configs/stm32butterfly2/src/stm32_boot.c
@@ -67,7 +67,7 @@ void stm32_boardinitialize(void)
  *   Initializes upper half drivers with board specific settings
  *
  * Returned Value:
- *   0 on sucess or errno value of failed init function.
+ *   0 on success or errno value of failed init function.
  ****************************************************************************/
 
 int board_app_initialize(uintptr_t arg)
diff --git a/configs/z80sim/README.txt b/configs/z80sim/README.txt
index b08fb31e06..0d29568fc3 100644
--- a/configs/z80sim/README.txt
+++ b/configs/z80sim/README.txt
@@ -54,7 +54,7 @@ Configuring NuttX
        or macOS" which will give you the steps you would need to do to convert
        this configuration to build in other environments.
 
-    3. This configuration was last verified sucessfully prior to the
+    3. This configuration was last verified successfully prior to the
        the configure to Kconfig/mconf tool using SDCC 2.6.0 built to run
        natively under Cygwin.  The current build requires ca. 3.2.1 SDCC.
 
@@ -96,7 +96,7 @@ Configuring NuttX
        or macOS" which will give you the steps you would need to do to convert
        this configuration to build in other environments.
 
-    3. This configuration was last verified sucessfully prior to the
+    3. This configuration was last verified successfully prior to the
        the configure to Kconfig/mconf tool using SDCC 2.6.0 built to run
        natively under Cygwin.nsh/defconfig:CONFIG_BOARD_LOOPSPERMSEC
 
@@ -139,7 +139,7 @@ Configuring NuttX
        or macOS" which will give you the steps you would need to do to convert
        this configuration to build in other environments.
 
-    3. This configuration was last verified sucessfully prior to the
+    3. This configuration was last verified successfully prior to the
        the configure to Kconfig/mconf tool using SDCC 2.6.0 built to run
        natively under Cygwin.nsh/defconfig:CONFIG_BOARD_LOOPSPERMSEC
 
diff --git a/drivers/analog/pga11x.c b/drivers/analog/pga11x.c
index c8adf31494..168199d6ed 100644
--- a/drivers/analog/pga11x.c
+++ b/drivers/analog/pga11x.c
@@ -348,7 +348,7 @@ PGA11X_HANDLE pga11x_initialize(FAR struct spi_dev_s *spi)
  *   settings - New channel and gain settings
  *
  * Returned Value:
- *   Zero on sucess; a negated errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
@@ -413,7 +413,7 @@ int pga11x_select(PGA11X_HANDLE handle,
  *   settings - New channel and gain settings
  *
  * Returned Value:
- *   Zero on sucess; a negated errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
@@ -467,7 +467,7 @@ int pga11x_uselect(PGA11X_HANDLE handle, int pos,
  *   settings - Returned channel and gain settings
  *
  * Returned Value:
- *   Zero on sucess; a negated errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
@@ -563,7 +563,7 @@ int pga11x_read(PGA11X_HANDLE handle, FAR struct pga11x_settings_s *settings)
  *   settings - Returned channel and gain settings
  *
  * Returned Value:
- *   Zero on sucess; a negated errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
@@ -605,7 +605,7 @@ int pga11x_uread(PGA11X_HANDLE handle, int pos,
  *   spi - An SPI "bottom half" device driver instance
  *
  * Returned Value:
- *   Zero on sucess; a negated errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
@@ -640,7 +640,7 @@ int pga11x_shutdown(PGA11X_HANDLE handle)
  *   pos      - Position of the chip in the daisy chain (0 or 1)
  *
  * Returned Value:
- *   Zero on sucess; a negated errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
@@ -681,7 +681,7 @@ int pga11x_ushutdown(PGA11X_HANDLE handle, int pos)
  *   spi - An SPI "bottom half" device driver instance
  *
  * Returned Value:
- *   Zero on sucess; a negated errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
@@ -719,7 +719,7 @@ int pga11x_enable(PGA11X_HANDLE handle)
  *   pos      - Position of the chip in the daisy chain (0 or 1)
  *
  * Returned Value:
- *   Zero on sucess; a negated errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
diff --git a/drivers/mtd/mtd_nand.c b/drivers/mtd/mtd_nand.c
index 09586f7e1c..7313eac6b8 100644
--- a/drivers/mtd/mtd_nand.c
+++ b/drivers/mtd/mtd_nand.c
@@ -138,7 +138,7 @@ static int     nand_ioctl(struct mtd_dev_s *dev, int cmd,
  *   block - Number of block to check.
  *
  * Returned Value:
- *   OK on success; a negater errno value on failure.
+ *   OK on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
diff --git a/drivers/usbdev/usbmsc.c b/drivers/usbdev/usbmsc.c
index 14b735301f..7f6eb48cf9 100644
--- a/drivers/usbdev/usbmsc.c
+++ b/drivers/usbdev/usbmsc.c
@@ -1780,7 +1780,7 @@ int usbmsc_classobject(FAR void *handle,
   ret = usbmsc_exportluns(handle);
   if (ret == OK)
     {
-      /* On sucess, return an (typed) instance of the class instance */
+      /* On success, return an (typed) instance of the class instance */
 
       *classdev = &alloc->drvr.drvr;
     }
diff --git a/drivers/usbhost/usbhost_cdcacm.c b/drivers/usbhost/usbhost_cdcacm.c
index 7353af369e..750bba1038 100644
--- a/drivers/usbhost/usbhost_cdcacm.c
+++ b/drivers/usbhost/usbhost_cdcacm.c
@@ -1708,7 +1708,7 @@ static void usbhost_putle32(uint8_t *dest, uint32_t val)
  *   priv - A reference to the class instance.
  *
  * Returned Value:
- *   On sucess, zero (OK) is returned.  On failure, an negated errno value
+ *   On success, zero (OK) is returned.  On failure, an negated errno value
  *   is returned to indicate the nature of the failure.
  *
  ****************************************************************************/
diff --git a/drivers/usbhost/usbhost_composite.c b/drivers/usbhost/usbhost_composite.c
index 05b8e8b030..6c18887c1e 100644
--- a/drivers/usbhost/usbhost_composite.c
+++ b/drivers/usbhost/usbhost_composite.c
@@ -491,7 +491,7 @@ static int usbhost_createconfig(FAR struct usbhost_member_s *member,
  *
  * Returned Value:
  *   Zero (OK) is returned if (1) the device was determined to be a
- *   composite device and (2) the composite class wrapper was sucessfully
+ *   composite device and (2) the composite class wrapper was successfully
  *   created and bound to the HCD.  A negated errno value is returned on
  *   any failure.  The value -ENOENT, in particular means that the attached
  *   device is not a composite device.  Other values would indicate other
diff --git a/drivers/usbhost/usbhost_composite.h b/drivers/usbhost/usbhost_composite.h
index 765624da2a..cf6b208fd7 100644
--- a/drivers/usbhost/usbhost_composite.h
+++ b/drivers/usbhost/usbhost_composite.h
@@ -80,7 +80,7 @@ extern "C"
  *
  * Returned Value:
  *   Zero (OK) is returned if (1) the device was determined to be a
- *   composite device and (2) the composite class wrapper was sucessfully
+ *   composite device and (2) the composite class wrapper was successfully
  *   created and bound to the HCD.  A negated errno value is returned on
  *   any failure.  The value -ENOENT, in particular means that the attached
  *   device is not a composite device.  Other values would indicate other
diff --git a/drivers/usbhost/usbhost_skeleton.c b/drivers/usbhost/usbhost_skeleton.c
index 3e1a4fdd28..01fe0b1b14 100644
--- a/drivers/usbhost/usbhost_skeleton.c
+++ b/drivers/usbhost/usbhost_skeleton.c
@@ -786,7 +786,7 @@ static void usbhost_putle32(uint8_t *dest, uint32_t val)
  *   priv - A reference to the class instance.
  *
  * Returned Value:
- *   On sucess, zero (OK) is returned.  On failure, an negated errno value
+ *   On success, zero (OK) is returned.  On failure, an negated errno value
  *   is returned to indicate the nature of the failure.
  *
  ****************************************************************************/
@@ -812,7 +812,7 @@ static inline int usbhost_talloc(FAR struct usbhost_state_s *priv)
  *   priv - A reference to the class instance.
  *
  * Returned Value:
- *   On sucess, zero (OK) is returned.  On failure, an negated errno value
+ *   On success, zero (OK) is returned.  On failure, an negated errno value
  *   is returned to indicate the nature of the failure.
  *
  ****************************************************************************/
diff --git a/drivers/usbhost/usbhost_storage.c b/drivers/usbhost/usbhost_storage.c
index 89ff54cac7..e3b5828429 100644
--- a/drivers/usbhost/usbhost_storage.c
+++ b/drivers/usbhost/usbhost_storage.c
@@ -1571,7 +1571,7 @@ static void usbhost_putbe32(uint8_t *dest, uint32_t val)
  *   priv - A reference to the class instance.
  *
  * Returned Value:
- *   On sucess, zero (OK) is returned.  On failure, an negated errno value
+ *   On success, zero (OK) is returned.  On failure, an negated errno value
  *   is returned to indicate the nature of the failure.
  *
  ****************************************************************************/
@@ -1597,7 +1597,7 @@ static inline int usbhost_talloc(FAR struct usbhost_state_s *priv)
  *   priv - A reference to the class instance.
  *
  * Returned Value:
- *   On sucess, zero (OK) is returned.  On failure, an negated errno value
+ *   On success, zero (OK) is returned.  On failure, an negated errno value
  *   is returned to indicate the nature of the failure.
  *
  ****************************************************************************/
diff --git a/drivers/usbhost/usbhost_xboxcontroller.c b/drivers/usbhost/usbhost_xboxcontroller.c
index 9d69d694bc..20a29c83ea 100644
--- a/drivers/usbhost/usbhost_xboxcontroller.c
+++ b/drivers/usbhost/usbhost_xboxcontroller.c
@@ -1472,7 +1472,7 @@ static void usbhost_putle32(uint8_t *dest, uint32_t val)
  *   priv - A reference to the class instance.
  *
  * Returned Value:
- *   On sucess, zero (OK) is returned.  On failure, an negated errno value
+ *   On success, zero (OK) is returned.  On failure, an negated errno value
  *   is returned to indicate the nature of the failure.
  *
  ****************************************************************************/
@@ -1498,7 +1498,7 @@ static inline int usbhost_talloc(FAR struct usbhost_state_s *priv)
  *   priv - A reference to the class instance.
  *
  * Returned Value:
- *   On sucess, zero (OK) is returned.  On failure, an negated errno value
+ *   On success, zero (OK) is returned.  On failure, an negated errno value
  *   is returned to indicate the nature of the failure.
  *
  ****************************************************************************/
diff --git a/graphics/vnc/server/vnc_negotiate.c b/graphics/vnc/server/vnc_negotiate.c
index 2e03d4d4f8..b87fb99707 100644
--- a/graphics/vnc/server/vnc_negotiate.c
+++ b/graphics/vnc/server/vnc_negotiate.c
@@ -86,7 +86,7 @@ static const char g_vncname[] = CONFIG_VNCSERVER_NAME;
  * Name: vnc_negotiate
  *
  * Description:
- *  Perform the VNC initialization sequence after the client has sucessfully
+ *  Perform the VNC initialization sequence after the client has successfully
  *  connected to the server.  Negotiate security, framebuffer and color
  *  properties.
  *
diff --git a/graphics/vnc/server/vnc_server.c b/graphics/vnc/server/vnc_server.c
index b16ef074f4..beda5edbf6 100644
--- a/graphics/vnc/server/vnc_server.c
+++ b/graphics/vnc/server/vnc_server.c
@@ -321,7 +321,7 @@ int vnc_server(int argc, FAR char *argv[])
           ginfo("New VNC connection\n");
 
           /* Perform the VNC initialization sequence after the client has
-           * sucessfully connected to the server.  Negotiate security,
+           * successfully connected to the server.  Negotiate security,
            * framebuffer and color properties.
            */
 
diff --git a/graphics/vnc/server/vnc_server.h b/graphics/vnc/server/vnc_server.h
index 3abc10dacf..04f41c28e8 100644
--- a/graphics/vnc/server/vnc_server.h
+++ b/graphics/vnc/server/vnc_server.h
@@ -352,7 +352,7 @@ int vnc_server(int argc, FAR char *argv[]);
  * Name: vnc_negotiate
  *
  * Description:
- *  Perform the VNC initialization sequence after the client has sucessfully
+ *  Perform the VNC initialization sequence after the client has successfully
  *  connected to the server.  Negotiate security, framebuffer and color
  *  properties.
  *
diff --git a/include/hex2bin.h b/include/hex2bin.h
index b1dc9ff8a4..f971bf8a87 100644
--- a/include/hex2bin.h
+++ b/include/hex2bin.h
@@ -209,7 +209,7 @@ int fhex2mem(FAR FILE *instream, uint32_t baseaddr, uint32_t endpaddr,
  *   Standard task inputs
  *
  * Returned Value:
- *   EXIT_SUCESS on success; EXIT_FAILURE on failure
+ *   EXIT_SUCCESS on success; EXIT_FAILURE on failure
  *
  ****************************************************************************/
 
@@ -227,7 +227,7 @@ int hex2bin_main(int argc, char **argv);
  *   Standard task inputs
  *
  * Returned Value:
- *   EXIT_SUCESS on success; EXIT_FAILURE on failure
+ *   EXIT_SUCCESS on success; EXIT_FAILURE on failure
  *
  ****************************************************************************/
 
diff --git a/libs/libc/dllfcn/lib_dlclose.c b/libs/libc/dllfcn/lib_dlclose.c
index 10aa3a4535..c5b3cc495d 100644
--- a/libs/libc/dllfcn/lib_dlclose.c
+++ b/libs/libc/dllfcn/lib_dlclose.c
@@ -106,7 +106,7 @@ static inline int dlremove(FAR void *handle)
 
       ret = modp->modinfo.uninitializer(modp->modinfo.arg);
 
-      /* Did the module sucessfully uninitialize? */
+      /* Did the module successfully uninitialize? */
 
       if (ret < 0)
         {
diff --git a/net/bluetooth/bluetooth_sockif.c b/net/bluetooth/bluetooth_sockif.c
index 46c6a130ef..e778e338c2 100644
--- a/net/bluetooth/bluetooth_sockif.c
+++ b/net/bluetooth/bluetooth_sockif.c
@@ -172,7 +172,7 @@ static int bluetooth_sockif_alloc(FAR struct socket *psock)
  *   protocol (see sys/socket.h)
  *
  * Returned Value:
- *   Zero (OK) is returned on success.  Otherwise, a negater errno value is
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/icmp/icmp_sockif.c b/net/icmp/icmp_sockif.c
index 4b7b679197..98fed32e5c 100644
--- a/net/icmp/icmp_sockif.c
+++ b/net/icmp/icmp_sockif.c
@@ -127,7 +127,7 @@ const struct sock_intf_s g_icmp_sockif =
  *   protocol (see sys/socket.h)
  *
  * Returned Value:
- *   Zero (OK) is returned on success.  Otherwise, a negater errno value is
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/icmpv6/icmpv6_sockif.c b/net/icmpv6/icmpv6_sockif.c
index 5ff0b3a394..f3d7ac0587 100644
--- a/net/icmpv6/icmpv6_sockif.c
+++ b/net/icmpv6/icmpv6_sockif.c
@@ -127,7 +127,7 @@ const struct sock_intf_s g_icmpv6_sockif =
  *   protocol (see sys/socket.h)
  *
  * Returned Value:
- *   Zero (OK) is returned on success.  Otherwise, a negater errno value is
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/ieee802154/ieee802154_sockif.c b/net/ieee802154/ieee802154_sockif.c
index 6ca653b265..525ef32b10 100644
--- a/net/ieee802154/ieee802154_sockif.c
+++ b/net/ieee802154/ieee802154_sockif.c
@@ -170,7 +170,7 @@ static int ieee802154_sockif_alloc(FAR struct socket *psock)
  *   protocol (see sys/socket.h)
  *
  * Returned Value:
- *   Zero (OK) is returned on success.  Otherwise, a negater errno value is
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/inet/inet_sockif.c b/net/inet/inet_sockif.c
index 7dbd5ffb94..87cb2bdba8 100644
--- a/net/inet/inet_sockif.c
+++ b/net/inet/inet_sockif.c
@@ -212,7 +212,7 @@ static int inet_udp_alloc(FAR struct socket *psock)
  *   protocol (see sys/socket.h)
  *
  * Returned Value:
- *   Zero (OK) is returned on success.  Otherwise, a negater errno value is
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/local/local_sockif.c b/net/local/local_sockif.c
index 453a26a2dc..8563167590 100644
--- a/net/local/local_sockif.c
+++ b/net/local/local_sockif.c
@@ -169,7 +169,7 @@ static int local_sockif_alloc(FAR struct socket *psock)
  *   protocol (see sys/socket.h)
  *
  * Returned Value:
- *   Zero (OK) is returned on success.  Otherwise, a negater errno value is
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/netlink/netlink_sockif.c b/net/netlink/netlink_sockif.c
index 5b9e3b5040..bfa6dc0522 100644
--- a/net/netlink/netlink_sockif.c
+++ b/net/netlink/netlink_sockif.c
@@ -128,7 +128,7 @@ const struct sock_intf_s g_netlink_sockif =
  *   protocol (see sys/socket.h)
  *
  * Returned Value:
- *   Zero (OK) is returned on success.  Otherwise, a negater errno value is
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/pkt/pkt_sockif.c b/net/pkt/pkt_sockif.c
index aed3a66027..f109882f52 100644
--- a/net/pkt/pkt_sockif.c
+++ b/net/pkt/pkt_sockif.c
@@ -167,7 +167,7 @@ static int pkt_sockif_alloc(FAR struct socket *psock)
  *   protocol (see sys/socket.h)
  *
  * Returned Value:
- *   Zero (OK) is returned on success.  Otherwise, a negater errno value is
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/sixlowpan/sixlowpan_hc1.c b/net/sixlowpan/sixlowpan_hc1.c
index ffbc479edf..6cbe776b35 100644
--- a/net/sixlowpan/sixlowpan_hc1.c
+++ b/net/sixlowpan/sixlowpan_hc1.c
@@ -289,7 +289,7 @@ int sixlowpan_compresshdr_hc1(FAR struct radio_driver_s *radio,
  *              FRAGN frames.
  *
  * Returned Value:
- *   Zero (OK) is returned on success, on failure a negater errno value is
+ *   Zero (OK) is returned on success, on failure a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/sixlowpan/sixlowpan_internal.h b/net/sixlowpan/sixlowpan_internal.h
index ccb11a2d6e..d3689f7de0 100644
--- a/net/sixlowpan/sixlowpan_internal.h
+++ b/net/sixlowpan/sixlowpan_internal.h
@@ -113,7 +113,7 @@
 
 /* Return values ************************************************************/
 
-/* Sucessful return values from header compression logic */
+/* Successful return values from header compression logic */
 
 #define COMPRESS_HDR_INLINE     0 /* L2 header not compressed */
 #define COMPRESS_HDR_ELIDED     1 /* L2 header compressed */
@@ -552,7 +552,7 @@ int sixlowpan_compresshdr_hc1(FAR struct radio_driver_s *radio,
  *              FRAGN frames.
  *
  * Returned Value:
- *   Zero (OK) is returned on success, on failure a negater errno value is
+ *   Zero (OK) is returned on success, on failure a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/net/usrsock/usrsock_sockif.c b/net/usrsock/usrsock_sockif.c
index 5f74f52174..ac6f88d2b9 100644
--- a/net/usrsock/usrsock_sockif.c
+++ b/net/usrsock/usrsock_sockif.c
@@ -109,7 +109,7 @@ const struct sock_intf_s g_usrsock_sockif =
  *   protocol (see sys/socket.h)
  *
  * Returned Value:
- *   Zero (OK) is returned on success.  Otherwise, a negater errno value is
+ *   Zero (OK) is returned on success.  Otherwise, a negated errno value is
  *   returned.
  *
  ****************************************************************************/
diff --git a/sched/environ/env_putenv.c b/sched/environ/env_putenv.c
index 9c7ca52b82..fa9a536ddf 100644
--- a/sched/environ/env_putenv.c
+++ b/sched/environ/env_putenv.c
@@ -66,7 +66,7 @@
  *   name=value string describing the environment setting to add/modify
  *
  * Returned Value:
- *   Zero on sucess
+ *   Zero on success
  *
  * Assumptions:
  *   Not called from an interrupt handler
diff --git a/sched/init/init.h b/sched/init/init.h
index b602786bc4..e0e5561a77 100644
--- a/sched/init/init.h
+++ b/sched/init/init.h
@@ -77,7 +77,7 @@ void os_start(void);
  *   None
  *
  * Returned Value:
- *   Zero on success; a negater errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  ****************************************************************************/
 
diff --git a/sched/init/os_smpstart.c b/sched/init/os_smpstart.c
index b6e7411a38..a204661cf9 100644
--- a/sched/init/os_smpstart.c
+++ b/sched/init/os_smpstart.c
@@ -183,7 +183,7 @@ int os_idle_task(int argc, FAR char *argv[])
  *   None
  *
  * Returned Value:
- *   Zero on success; a negater errno value on failure.
+ *   Zero on success; a negated errno value on failure.
  *
  * Assumption:
  *   Runs before the full initialization sequence has completed.  Runs after
diff --git a/sched/module/mod_rmmod.c b/sched/module/mod_rmmod.c
index 50ba3bcbf8..810d5ba094 100644
--- a/sched/module/mod_rmmod.c
+++ b/sched/module/mod_rmmod.c
@@ -107,7 +107,7 @@ int rmmod(FAR void *handle)
 
       ret = modp->modinfo.uninitializer(modp->modinfo.arg);
 
-      /* Did the module sucessfully uninitialize? */
+      /* Did the module successfully uninitialize? */
 
       if (ret < 0)
         {
diff --git a/sched/mqueue/mq_send.c b/sched/mqueue/mq_send.c
index 516f8b2de7..9a5912f2ab 100644
--- a/sched/mqueue/mq_send.c
+++ b/sched/mqueue/mq_send.c
@@ -138,7 +138,7 @@ int nxmq_send(mqd_t mqdes, FAR const char *msg, size_t msglen, int prio)
 
       mqmsg = nxmq_alloc_msg();
 
-      /* Check if the message was sucessfully allocated */
+      /* Check if the message was successfully allocated */
 
       ret = (mqmsg == NULL) ? -ENOMEM : OK;
     }
diff --git a/sched/pthread/pthread_create.c b/sched/pthread/pthread_create.c
index a69c9bccf4..fe75d53e2d 100644
--- a/sched/pthread/pthread_create.c
+++ b/sched/pthread/pthread_create.c
@@ -177,7 +177,7 @@ static void pthread_start(void)
 
   DEBUGASSERT(group && pjoin);
 
-  /* Sucessfully spawned, add the pjoin to our data set. */
+  /* Successfully spawned, add the pjoin to our data set. */
 
   (void)pthread_sem_take(&group->tg_joinsem, false);
   pthread_addjoininfo(group, pjoin);