diff --git a/docs/INSTALL.md b/docs/INSTALL.md
index a35cffa98..29863af02 100644
--- a/docs/INSTALL.md
+++ b/docs/INSTALL.md
@@ -423,7 +423,7 @@ OpenSSL, follow the OpenSSL build instructions and then install `libssl.a` and
 OpenSSL like this:
 
 ```bash
-LIBS="-lssl -lcrypto -lc++" # For OpenSSL/BoringSSL. In general, you will need to the SSL/TLS layer's transtive dependencies if you are linking statically.
+LIBS="-lssl -lcrypto -lc++" # For OpenSSL/BoringSSL. In general, you will need to the SSL/TLS layer's transitive dependencies if you are linking statically.
 ./configure --host aarch64-linux-android --with-pic --disable-shared --with-openssl="$TOOLCHAIN/sysroot/usr"
 ```
 
diff --git a/docs/examples/htmltitle.cpp b/docs/examples/htmltitle.cpp
index 0f4bad4a8..ee3e023a2 100644
--- a/docs/examples/htmltitle.cpp
+++ b/docs/examples/htmltitle.cpp
@@ -272,7 +272,7 @@ int main(int argc, char *argv[])
   // Initialize CURL connection
 
   if(!init(conn, argv[1])) {
-    fprintf(stderr, "Connection initializion failed\n");
+    fprintf(stderr, "Connection initialization failed\n");
     exit(EXIT_FAILURE);
   }
 
diff --git a/docs/examples/httpput.c b/docs/examples/httpput.c
index c80100bbe..b9a6c87b7 100644
--- a/docs/examples/httpput.c
+++ b/docs/examples/httpput.c
@@ -101,8 +101,8 @@ int main(int argc, char **argv)
     /* now specify which file to upload */
     curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);
 
-    /* provide the size of the upload, we specicially typecast the value
-       to curl_off_t since we must be sure to use the correct data size */
+    /* provide the size of the upload, we typecast the value to curl_off_t
+       since we must be sure to use the correct data size */
     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
                      (curl_off_t)file_info.st_size);
 
diff --git a/lib/cf-h2-proxy.c b/lib/cf-h2-proxy.c
index 13913a852..8e76ff84a 100644
--- a/lib/cf-h2-proxy.c
+++ b/lib/cf-h2-proxy.c
@@ -255,7 +255,7 @@ static int h2_client_new(struct Curl_cfilter *cf,
   int rc = nghttp2_option_new(&o);
   if(rc)
     return rc;
-  /* We handle window updates ourself to enfore buffer limits */
+  /* We handle window updates ourself to enforce buffer limits */
   nghttp2_option_set_no_auto_window_update(o, 1);
 #if NGHTTP2_VERSION_NUM >= 0x013200
   /* with 1.50.0 */
diff --git a/lib/cf-socket.c b/lib/cf-socket.c
index 55f1e06f4..bd3719b8b 100644
--- a/lib/cf-socket.c
+++ b/lib/cf-socket.c
@@ -747,7 +747,7 @@ CURLcode Curl_socket_connect_result(struct Curl_easy *data,
 }
 
 /* We have a recv buffer to enhance reads with len < NW_SMALL_READS.
- * This happens often on TLS connections where the TLS implemenation
+ * This happens often on TLS connections where the TLS implementation
  * tries to read the head of a TLS record, determine the length of the
  * full record and then make a subsequent read for that.
  * On large reads, we will not fill the buffer to avoid the double copy. */
diff --git a/lib/cookie.c b/lib/cookie.c
index 22bc2e6fe..0303efbb0 100644
--- a/lib/cookie.c
+++ b/lib/cookie.c
@@ -1721,7 +1721,7 @@ static CURLcode cookie_output(struct Curl_easy *data,
   }
 
   /*
-   * If we reach here we have successfully written a cookie file so theree is
+   * If we reach here we have successfully written a cookie file so there is
    * no need to inspect the error, any error case should have jumped into the
    * error block below.
    */
diff --git a/lib/curl_addrinfo.c b/lib/curl_addrinfo.c
index 35a06350d..f9211d3f5 100644
--- a/lib/curl_addrinfo.c
+++ b/lib/curl_addrinfo.c
@@ -274,7 +274,7 @@ Curl_he2ai(const struct hostent *he, int port)
 
   for(i = 0; (curr = he->h_addr_list[i]) != NULL; i++) {
     size_t ss_size;
-    size_t namelen = strlen(he->h_name) + 1; /* include null-terminatior */
+    size_t namelen = strlen(he->h_name) + 1; /* include null-terminator */
 #ifdef ENABLE_IPV6
     if(he->h_addrtype == AF_INET6)
       ss_size = sizeof(struct sockaddr_in6);
diff --git a/lib/http2.c b/lib/http2.c
index c666192fc..febd8f1ff 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -81,7 +81,7 @@
 /* spare chunks we keep for a full window */
 #define H2_STREAM_POOL_SPARES   (H2_STREAM_WINDOW_SIZE / H2_CHUNK_SIZE)
 
-/* We need to accomodate the max number of streams with their window
+/* We need to accommodate the max number of streams with their window
  * sizes on the overall connection. Streams might become PAUSED which
  * will block their received QUOTA in the connection window. And if we
  * run out of space, the server is blocked from sending us any data.
@@ -327,7 +327,7 @@ static int h2_client_new(struct Curl_cfilter *cf,
   int rc = nghttp2_option_new(&o);
   if(rc)
     return rc;
-  /* We handle window updates ourself to enfore buffer limits */
+  /* We handle window updates ourself to enforce buffer limits */
   nghttp2_option_set_no_auto_window_update(o, 1);
 #if NGHTTP2_VERSION_NUM >= 0x013200
   /* with 1.50.0 */
diff --git a/lib/urlapi.c b/lib/urlapi.c
index 96e5d440a..ab62773d3 100644
--- a/lib/urlapi.c
+++ b/lib/urlapi.c
@@ -651,7 +651,7 @@ static CURLUcode hostname_check(struct Curl_URL *u, char *hostname,
  */
 
 #define HOST_ERROR   -1 /* out of memory */
-#define HOST_BAD     -2 /* bad IPv4 adddress */
+#define HOST_BAD     -2 /* bad IPv4 address */
 
 #define HOST_NAME    1
 #define HOST_IPV4    2
diff --git a/lib/vauth/vauth.h b/lib/vauth/vauth.h
index e17d7aad6..d8cff2438 100644
--- a/lib/vauth/vauth.h
+++ b/lib/vauth/vauth.h
@@ -219,7 +219,7 @@ bool Curl_auth_is_spnego_supported(void);
    message */
 CURLcode Curl_auth_decode_spnego_message(struct Curl_easy *data,
                                          const char *user,
-                                         const char *passwood,
+                                         const char *password,
                                          const char *service,
                                          const char *host,
                                          const char *chlg64,
diff --git a/lib/vquic/curl_ngtcp2.c b/lib/vquic/curl_ngtcp2.c
index 4baefc48f..f59a25326 100644
--- a/lib/vquic/curl_ngtcp2.c
+++ b/lib/vquic/curl_ngtcp2.c
@@ -1443,7 +1443,7 @@ static int cb_h3_acked_req_body(nghttp3_conn *conn, int64_t stream_id,
   (void)cf;
   if(!stream)
     return 0;
-  /* The server ackknowledged `datalen` of bytes from our request body.
+  /* The server acknowledged `datalen` of bytes from our request body.
    * This is a delta. We have kept this data in `sendbuf` for
    * re-transmissions and can free it now. */
   if(datalen >= (uint64_t)stream->sendbuf_len_in_flight)
diff --git a/lib/vtls/sectransp.c b/lib/vtls/sectransp.c
index 4ad8f6873..c9f02f2d5 100644
--- a/lib/vtls/sectransp.c
+++ b/lib/vtls/sectransp.c
@@ -2719,7 +2719,7 @@ check_handshake:
         failf(data, "Peer rejected unexpected message");
         break;
 #if CURL_BUILD_MAC_10_11 || CURL_BUILD_IOS_9
-      /* Treaing non-fatal error as fatal like before */
+      /* Treating non-fatal error as fatal like before */
       case errSSLClientHelloReceived:
         failf(data, "A non-fatal result for providing a server name "
                     "indication");
diff --git a/lib/vtls/x509asn1.c b/lib/vtls/x509asn1.c
index c29820045..83d0fbb54 100644
--- a/lib/vtls/x509asn1.c
+++ b/lib/vtls/x509asn1.c
@@ -172,7 +172,7 @@ static const struct Curl_OID OIDtable[] = {
  * It is intended to support certificate information gathering for SSL backends
  * that offer a mean to get certificates as a whole, but do not supply
  * entry points to get particular certificate sub-fields.
- * Please note there is no pretention here to rewrite a full SSL library.
+ * Please note there is no pretension here to rewrite a full SSL library.
  */
 
 static const char *getASN1Element(struct Curl_asn1Element *elem,
diff --git a/m4/curl-confopts.m4 b/m4/curl-confopts.m4
index 1e2632d06..37f7d4c2e 100644
--- a/m4/curl-confopts.m4
+++ b/m4/curl-confopts.m4
@@ -475,9 +475,8 @@ AC_DEFUN([CURL_CONFIGURE_SYMBOL_HIDING], [
 
 dnl CURL_CHECK_LIB_ARES
 dnl -------------------------------------------------
-dnl When c-ares library support has been requested,
-dnl performs necessary checks and adjustsments needed
-dnl to enable support of this library.
+dnl When c-ares library support has been requested, performs necessary checks
+dnl and adjustments needed to enable support of this library.
 
 AC_DEFUN([CURL_CHECK_LIB_ARES], [
   #
diff --git a/packages/OS400/curl.inc.in b/packages/OS400/curl.inc.in
index b611c73bb..0961a0e4b 100644
--- a/packages/OS400/curl.inc.in
+++ b/packages/OS400/curl.inc.in
@@ -2281,7 +2281,7 @@
      d  CURLSTS_DONE   c                   1
      d  CURLSTS_FAIL   c                   2
       *
-      *  Renaming CURLMsg to CURL_Msg to avoid case-insensivity name clash.
+      *  Renaming CURLMsg to CURL_Msg to avoid case-insensitivity name clash.
       *
      d CURL_Msg        ds                  based(######ptr######)
      d                                     qualified
diff --git a/packages/OS400/initscript.sh b/packages/OS400/initscript.sh
index d464ae6cf..d275146f1 100755
--- a/packages/OS400/initscript.sh
+++ b/packages/OS400/initscript.sh
@@ -208,7 +208,7 @@ make_module()
         #               putting it in an include file makes it only active
         #               for that include file.
         #       Thus we build a temporary file with the pragma prepended to
-        #               the source file and we compile that themporary file.
+        #               the source file and we compile that temporary file.
 
         echo "#line 1 \"${2}\"" > __tmpsrcf.c
         echo "#pragma convert(819)" >> __tmpsrcf.c
diff --git a/packages/vms/curl_release_note_start.txt b/packages/vms/curl_release_note_start.txt
index a11b7c5cc..62b283635 100644
--- a/packages/vms/curl_release_note_start.txt
+++ b/packages/vms/curl_release_note_start.txt
@@ -2,7 +2,7 @@ From file: CURL_RELEASE_NOTE_START.TXT
 
 Note: These kits are produced by a hobbyist and are providing any support
 or any commitment to supply bug fixes or future releases.  This code is
-as-is with no warrantees.
+as-is with no warranties.
 
 The testing of this build of curl was minimal and involved building some of
 the sample and test programs, accessing a public HTTPS: website, doing a
diff --git a/src/tool_cb_rea.c b/src/tool_cb_rea.c
index c9379a3d8..401e32077 100644
--- a/src/tool_cb_rea.c
+++ b/src/tool_cb_rea.c
@@ -87,7 +87,7 @@ size_t tool_read_cb(char *buffer, size_t sz, size_t nmemb, void *userdata)
   }
   in->config->readbusy = FALSE;
 
-  /* when select() rerturned zero here, it timed out */
+  /* when select() returned zero here, it timed out */
   return (size_t)rc;
 }
 
diff --git a/src/tool_cfgable.h b/src/tool_cfgable.h
index 9a15659bc..35826e695 100644
--- a/src/tool_cfgable.h
+++ b/src/tool_cfgable.h
@@ -118,7 +118,7 @@ struct OperationConfig {
   bool dirlistonly;         /* only get the FTP dir list */
   bool followlocation;      /* follow http redirects */
   bool unrestricted_auth;   /* Continue to send authentication (user+password)
-                               when following ocations, even when hostname
+                               when following redirects, even when hostname
                                changed */
   bool netrc_opt;
   bool netrc;
diff --git a/tests/data/test178 b/tests/data/test178
index ca59e9df0..03c1a441d 100644
--- a/tests/data/test178
+++ b/tests/data/test178
@@ -53,7 +53,7 @@ Accept: */*
 </protocol>
 
 # Hyper curl returns unsupported protocol
-# bullt-in curl returns weird_server_reply
+# built-in curl returns weird_server_reply
 <errorcode>
 %if hyper
 1
diff --git a/tests/data/test1906 b/tests/data/test1906
index c43b0a9be..61cc04578 100644
--- a/tests/data/test1906
+++ b/tests/data/test1906
@@ -30,7 +30,7 @@ CURLOPT_CURLU and CURLOPT_PORT
 lib%TESTNUMBER
 </tool>
 
-# The tool does two requesets, the first sets CURLOPT_PORT to 1
+# The tool does two requests, the first sets CURLOPT_PORT to 1
 # the second resets the port again and expects that request to work.
 <command>
 http://%HOSTIP:%HTTPPORT/%TESTNUMBER
diff --git a/tests/data/test31 b/tests/data/test31
index 6fe4910d1..821fed9fb 100644
--- a/tests/data/test31
+++ b/tests/data/test31
@@ -11,7 +11,7 @@ cookiejar
 #
 # The cookies set come in two versions. This is because when curl is built
 # with Hyper, the API provides the headers already "sanitized" so we cannot
-# compapare with the exact server contents unlesss it too sends the data
+# compare with the exact server contents unless it too sends the data
 # "clean".
 
 <reply>
diff --git a/tests/data/test415 b/tests/data/test415
index e65968043..099ec830b 100644
--- a/tests/data/test415
+++ b/tests/data/test415
@@ -53,7 +53,7 @@ Accept: */*
 </protocol>
 
 # Hyper curl returns unsupported protocol
-# bullt-in curl returns weird_server_reply
+# built-in curl returns weird_server_reply
 <errorcode>
 %if hyper
 1
diff --git a/tests/data/test420 b/tests/data/test420
index b5c7cb96b..3d6b624c6 100644
--- a/tests/data/test420
+++ b/tests/data/test420
@@ -34,7 +34,7 @@ Set-Cookie: mycookie1=; Path=/; Max-Age=-1; Expires=Thu, 01 Jan 1970 00:00:00 GM
 http
 </server>
  <name>
-Setting cookies set with expried dates that were loaded from jar
+Setting cookies set with expired dates that were loaded from jar
  </name>
  <command>
 http://%HOSTIP:%HTTPPORT/func_test/del_cookie -b %LOGDIR/cookie%TESTNUMBER -c %LOGDIR/save%TESTNUMBER
diff --git a/tests/devtest.pl b/tests/devtest.pl
index 6c33b242f..99a25ab66 100755
--- a/tests/devtest.pl
+++ b/tests/devtest.pl
@@ -24,7 +24,7 @@
 ###########################################################################
 
 # This script is intended for developers to test some internals of the
-# runtests.pl harneess. Don't try to use this unless you know what you're
+# runtests.pl harness. Don't try to use this unless you know what you're
 # doing!
 
 # An example command-line that starts a test http server for test 11 and waits
diff --git a/tests/testutil.pm b/tests/testutil.pm
index a2785f85b..eabf035f8 100644
--- a/tests/testutil.pm
+++ b/tests/testutil.pm
@@ -22,7 +22,7 @@
 #
 ###########################################################################
 
-# This module contains miscellanous functions needed in several parts of
+# This module contains miscellaneous functions needed in several parts of
 # the test suite.
 
 package testutil;
diff --git a/tests/unit/unit1399.c b/tests/unit/unit1399.c
index 83e0f4543..1a293ac76 100644
--- a/tests/unit/unit1399.c
+++ b/tests/unit/unit1399.c
@@ -76,7 +76,7 @@ static void expect_timer_seconds(struct Curl_easy *data, int seconds)
 }
 
 /* Scenario: simulate a redirect. When a redirect occurs, t_nslookup,
- * t_connect, t_appconnect, t_pretransfer, and t_starttransfer are addative.
+ * t_connect, t_appconnect, t_pretransfer, and t_starttransfer are additive.
  * E.g., if t_starttransfer took 2 seconds initially and took another 1
  * second for the redirect request, then the resulting t_starttransfer should
  * be 3 seconds. */
diff --git a/tests/unit/unit2600.c b/tests/unit/unit2600.c
index 3e346e04f..1ff7740f7 100644
--- a/tests/unit/unit2600.c
+++ b/tests/unit/unit2600.c
@@ -364,36 +364,36 @@ static struct test_case TEST_CASES[] = {
   /* TIMEOUT_MS,        FAIL_MS      CREATED    DURATION     Result, HE_PREF */
   /* CNCT   HE          v4    v6     v4 v6      MIN   MAX */
   { 1, TURL, "test.com:123:192.0.2.1", CURL_IPRESOLVE_WHATEVER,
-     250,  150,        200,  200,    1,  0,      200,  500,  R_FAIL, NULL },
+    250,  150,        200,  200,    1,  0,      200,  500,  R_FAIL, NULL },
   /* 1 ipv4, fails after ~200ms, reports COULDNT_CONNECT   */
   { 2, TURL, "test.com:123:192.0.2.1,192.0.2.2", CURL_IPRESOLVE_WHATEVER,
-     500,  150,        200,  200,    2,  0,      400,  800,  R_FAIL, NULL },
+    500,  150,        200,  200,    2,  0,      400,  800,  R_FAIL, NULL },
   /* 2 ipv4, fails after ~400ms, reports COULDNT_CONNECT   */
 #ifdef ENABLE_IPV6
   { 3, TURL, "test.com:123:::1", CURL_IPRESOLVE_WHATEVER,
-     250,  150,        200,  200,    0,  1,      200,  500,  R_FAIL, NULL },
+    250,  150,        200,  200,    0,  1,      200,  500,  R_FAIL, NULL },
   /* 1 ipv6, fails after ~200ms, reports COULDNT_CONNECT   */
   { 4, TURL, "test.com:123:::1,::2", CURL_IPRESOLVE_WHATEVER,
-     500,  150,        200,  200,    0,  2,      400,  800,  R_FAIL, NULL },
+    500,  150,        200,  200,    0,  2,      400,  800,  R_FAIL, NULL },
   /* 2 ipv6, fails after ~400ms, reports COULDNT_CONNECT   */
 
   { 5, TURL, "test.com:123:192.0.2.1,::1", CURL_IPRESOLVE_WHATEVER,
-     500,  150,        200, 200,     1,  1,      350,  800,  R_FAIL, "v4" },
+    500,  150,        200, 200,     1,  1,      350,  800,  R_FAIL, "v4" },
   /* mixed ip4+6, v4 starts, v6 kicks in on HE, fails after ~350ms */
   { 6, TURL, "test.com:123:::1,192.0.2.1", CURL_IPRESOLVE_WHATEVER,
-     500,  150,        200, 200,     1,  1,      350,  800,  R_FAIL, "v6" },
+    500,  150,        200, 200,     1,  1,      350,  800,  R_FAIL, "v6" },
   /* mixed ip6+4, v6 starts, v4 kicks in on HE, fails after ~350ms */
   { 7, TURL, "test.com:123:::1,192.0.2.1,::2,::3", CURL_IPRESOLVE_WHATEVER,
-     500,  600,        200, 200,     0,  3,      350,  800,  R_FAIL, "v6" },
+    500,  600,        200, 200,     0,  3,      350,  800,  R_FAIL, "v6" },
   /* mixed ip6+4, v6 starts, v4 never starts due to high HE, TIMEOUT */
   { 8, TURL, "test.com:123:192.0.2.1,::1", CURL_IPRESOLVE_V4,
-     400,  150,        500, 500,     1,  0,      400,  600,  R_FAIL, NULL },
+    400,  150,        500, 500,     1,  0,      400,  600,  R_FAIL, NULL },
   /* mixed ip4+6, but only use v4, check it uses full connect timeout,
-     although another address of the 'wrong' family is availbale */
+     although another address of the 'wrong' family is available */
   { 9, TURL, "test.com:123:::1,192.0.2.1", CURL_IPRESOLVE_V6,
-     400,  150,        500, 500,     0,  1,      400,  600,  R_FAIL, NULL },
+    400,  150,        500, 500,     0,  1,      400,  600,  R_FAIL, NULL },
   /* mixed ip4+6, but only use v6, check it uses full connect timeout,
-     although another address of the 'wrong' family is availbale */
+     although another address of the 'wrong' family is available */
 #endif
 };