diff --git a/benchmark/compare.R b/benchmark/compare.R
index 3f37cad74ad847..5085f4ea73b71a 100644
--- a/benchmark/compare.R
+++ b/benchmark/compare.R
@@ -47,7 +47,7 @@ statistics = ddply(dat, "name", function(subdat) {
 
   p.value = NA;
   confidence = 'NA';
-  # Check if there is enough data to calulate the calculate the p-value
+  # Check if there is enough data to calculate the calculate the p-value
   if (length(old.rate) > 1 && length(new.rate) > 1) {
     # Perform a statistics test to see of there actually is a difference in
     # performance.
diff --git a/benchmark/compare.js b/benchmark/compare.js
index af36d1c4239edf..a671bc9f3d7be6 100644
--- a/benchmark/compare.js
+++ b/benchmark/compare.js
@@ -9,7 +9,7 @@ const BenchmarkProgress = require('./_benchmark_progress.js');
 // Parse arguments
 //
 const cli = CLI(`usage: ./node compare.js [options] [--] <category> ...
-  Run each benchmark in the <category> directory many times using two diffrent
+  Run each benchmark in the <category> directory many times using two different
   node versions. More than one <category> directory can be specified.
   The output is formatted as csv, which can be processed using for
   example 'compare.R'.
diff --git a/configure b/configure
index e1e8ab5a861c29..0ec69229a8530f 100755
--- a/configure
+++ b/configure
@@ -503,7 +503,7 @@ def warn(msg):
   prefix = '\033[1m\033[93mWARNING\033[0m' if os.isatty(1) else 'WARNING'
   print('%s: %s' % (prefix, msg))
 
-# track if warnings occured
+# track if warnings occurred
 warn.warned = False
 
 def b(value):
diff --git a/doc/api_assets/dnt_helper.js b/doc/api_assets/dnt_helper.js
index f255d916c2df32..9906db4f276cd7 100644
--- a/doc/api_assets/dnt_helper.js
+++ b/doc/api_assets/dnt_helper.js
@@ -26,7 +26,7 @@ function _dntEnabled(dnt, userAgent) {
     var fxMatch = ua.match(/Firefox\/(\d+)/);
     var ieRegEx = /MSIE|Trident/i;
     var isIE = ieRegEx.test(ua);
-    // Matches from Windows up to the first occurance of ; un-greedily
+    // Matches from Windows up to the first occurrence of ; un-greedily
     // http://www.regexr.com/3c2el
     var platform = ua.match(/Windows.+?(?=;)/g);
 
diff --git a/doc/changelogs/CHANGELOG_ARCHIVE.md b/doc/changelogs/CHANGELOG_ARCHIVE.md
index 797317ea43fe81..7a643ca5c3a397 100644
--- a/doc/changelogs/CHANGELOG_ARCHIVE.md
+++ b/doc/changelogs/CHANGELOG_ARCHIVE.md
@@ -3025,7 +3025,7 @@ https://github.com/nodejs/node/commit/311d7dee19034ff1c6bc9098c36973b8d687eaba
   * After V8 heap is compact, don't use a timer every 2 seconds.
 
   * Improve nextTick implementation.
-  * Add primative support for Upgrading HTTP connections.
+  * Add primitive support for Upgrading HTTP connections.
     (See commit log for docs 760bba5)
 
   * Add timeout and maxBuffer options to child_process.exec
diff --git a/doc/changelogs/CHANGELOG_V5.md b/doc/changelogs/CHANGELOG_V5.md
index aa69d93f7ce180..5fefbcc81a6b85 100644
--- a/doc/changelogs/CHANGELOG_V5.md
+++ b/doc/changelogs/CHANGELOG_V5.md
@@ -215,7 +215,7 @@ This is a security release. All Node.js users should consult the security releas
 ### Notable changes
 
 **http**:
-  * Enclose IPv6 Host header in square brackets. This will enable proper separation of the host adress from any port reference (Mihai Potra) [#5314](https://github.com/nodejs/node/pull/5314)
+  * Enclose IPv6 Host header in square brackets. This will enable proper separation of the host address from any port reference (Mihai Potra) [#5314](https://github.com/nodejs/node/pull/5314)
 
 **path**:
   * Make win32.isAbsolute more consistent (Brian White) [#6028](https://github.com/nodejs/node/pull/6028)
diff --git a/src/debug-agent.cc b/src/debug-agent.cc
index 2d8ed8afc980ec..2ce8381fc51462 100644
--- a/src/debug-agent.cc
+++ b/src/debug-agent.cc
@@ -182,7 +182,7 @@ void Agent::WorkerRun() {
     CHECK_EQ(&child_loop_, env.event_loop());
     uv_run(&child_loop_, UV_RUN_DEFAULT);
 
-    // Clean-up peristent
+    // Clean-up persistent
     api_.Reset();
   }
   isolate->Dispose();
diff --git a/src/node.cc b/src/node.cc
index 57415bba41805c..a7c171b75cee83 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -3464,7 +3464,7 @@ void LoadEnvironment(Environment* env) {
   // (FatalException(), break on uncaught exception in debugger)
   //
   // This is not strictly necessary since it's almost impossible
-  // to attach the debugger fast enought to break on exception
+  // to attach the debugger fast enough to break on exception
   // thrown during process startup.
   try_catch.SetVerbose(true);
 
diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index e2a83a548a967c..9cbabcd530c900 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -913,7 +913,7 @@ void SecureContext::SetDHParam(const FunctionCallbackInfo<Value>& args) {
   (void) &clear_error_on_return;  // Silence compiler warning.
 
   // Auto DH is not supported in openssl 1.0.1, so dhparam needs
-  // to be specifed explicitly
+  // to be specified explicitly
   if (args.Length() != 1)
     return env->ThrowTypeError("DH argument is mandatory");
 
diff --git a/src/string_search.h b/src/string_search.h
index abc69edb87621d..6040888110c2ec 100644
--- a/src/string_search.h
+++ b/src/string_search.h
@@ -238,7 +238,7 @@ inline const void* MemrchrFill(const void* haystack, uint8_t needle,
 }
 
 
-// Finds the first occurence of *two-byte* character pattern[0] in the string
+// Finds the first occurrence of *two-byte* character pattern[0] in the string
 // `subject`. Does not check that the whole pattern matches.
 template <typename Char>
 inline size_t FindFirstCharacter(Vector<const Char> pattern,
@@ -284,7 +284,7 @@ inline size_t FindFirstCharacter(Vector<const Char> pattern,
 }
 
 
-// Finds the first occurance of the byte pattern[0] in string `subject`.
+// Finds the first occurrence of the byte pattern[0] in string `subject`.
 // Does not verify that the whole pattern matches.
 template <>
 inline size_t FindFirstCharacter(Vector<const uint8_t> pattern,
@@ -373,7 +373,7 @@ size_t StringSearch<Char>::BoyerMooreSearch(
   // Only preprocess at most kBMMaxShift last characters of pattern.
   size_t start = search->start_;
 
-  int* bad_char_occurence = search->bad_char_table();
+  int* bad_char_occurrence = search->bad_char_table();
   int* good_suffix_shift = search->good_suffix_shift_table();
 
   Char last_char = pattern[pattern_length - 1];
@@ -383,7 +383,7 @@ size_t StringSearch<Char>::BoyerMooreSearch(
     size_t j = pattern_length - 1;
     int c;
     while (last_char != (c = subject[index + j])) {
-      int shift = j - CharOccurrence(bad_char_occurence, c);
+      int shift = j - CharOccurrence(bad_char_occurrence, c);
       index += shift;
       if (index > subject_length - pattern_length) {
         return subject.length();
@@ -399,11 +399,11 @@ size_t StringSearch<Char>::BoyerMooreSearch(
       // we have matched more than our tables allow us to be smart about.
       // Fall back on BMH shift.
       index += pattern_length - 1 -
-               CharOccurrence(bad_char_occurence,
+               CharOccurrence(bad_char_occurrence,
                               static_cast<Char>(last_char));
     } else {
       int gs_shift = good_suffix_shift[j + 1];
-      int bc_occ = CharOccurrence(bad_char_occurence, c);
+      int bc_occ = CharOccurrence(bad_char_occurrence, c);
       int shift = j - bc_occ;
       if (gs_shift > shift) {
         shift = gs_shift;
diff --git a/src/tls_wrap.cc b/src/tls_wrap.cc
index d56128fec6c5ce..581e017ef85016 100644
--- a/src/tls_wrap.cc
+++ b/src/tls_wrap.cc
@@ -123,7 +123,7 @@ void TLSWrap::InitSSL() {
 
   SSL_set_bio(ssl_, enc_in_, enc_out_);
 
-  // NOTE: This could be overriden in SetVerifyMode
+  // NOTE: This could be overridden in SetVerifyMode
   SSL_set_verify(ssl_, SSL_VERIFY_NONE, crypto::VerifyCallback);
 
 #ifdef SSL_MODE_RELEASE_BUFFERS
diff --git a/test/internet/test-dgram-broadcast-multi-process.js b/test/internet/test-dgram-broadcast-multi-process.js
index da3bd8cceb74e3..8414e558bab6d1 100644
--- a/test/internet/test-dgram-broadcast-multi-process.js
+++ b/test/internet/test-dgram-broadcast-multi-process.js
@@ -227,7 +227,7 @@ if (process.argv[2] === 'child') {
   listenSocket.on('close', function() {
     //HACK: Wait to exit the process to ensure that the parent
     //process has had time to receive all messages via process.send()
-    //This may be indicitave of some other issue.
+    //This may be indicative of some other issue.
     setTimeout(function() {
       process.exit();
     }, 1000);
diff --git a/test/parallel/test-child-process-fork-dgram.js b/test/parallel/test-child-process-fork-dgram.js
index 4447c54cae8f0c..37b40dccd3f369 100644
--- a/test/parallel/test-child-process-fork-dgram.js
+++ b/test/parallel/test-child-process-fork-dgram.js
@@ -63,7 +63,7 @@ if (process.argv[2] === 'child') {
     const timer = setInterval(function() {
       /*
        * Both the parent and the child got at least one message,
-       * test passed, clean up everyting.
+       * test passed, clean up everything.
        */
       if (parentGotMessage && childGotMessage) {
         clearInterval(timer);
diff --git a/test/parallel/test-cluster-message.js b/test/parallel/test-cluster-message.js
index 5b537bbe73a755..0b699093821b82 100644
--- a/test/parallel/test-cluster-message.js
+++ b/test/parallel/test-cluster-message.js
@@ -102,7 +102,7 @@ if (cluster.isWorker) {
       if (data.code === 'received message') {
         check('worker', data.echo === 'message from master');
       } else {
-        throw new Error('wrong TCP message recived: ' + data);
+        throw new Error('wrong TCP message received: ' + data);
       }
     });
 
diff --git a/test/parallel/test-cluster-setup-master-multiple.js b/test/parallel/test-cluster-setup-master-multiple.js
index 25cff7cb33e0c1..c8fefddc39a23e 100644
--- a/test/parallel/test-cluster-setup-master-multiple.js
+++ b/test/parallel/test-cluster-setup-master-multiple.js
@@ -6,7 +6,7 @@ const cluster = require('cluster');
 assert(cluster.isMaster);
 
 // The cluster.settings object is cloned even though the current implementation
-// makes that unecessary. This is to make the test less fragile if the
+// makes that unnecessary. This is to make the test less fragile if the
 // implementation ever changes such that cluster.settings is mutated instead of
 // replaced.
 function cheapClone(obj) {
diff --git a/test/parallel/test-crypto-binary-default.js b/test/parallel/test-crypto-binary-default.js
index 6ee3aeac36dd89..7dbd5e41639a38 100644
--- a/test/parallel/test-crypto-binary-default.js
+++ b/test/parallel/test-crypto-binary-default.js
@@ -477,7 +477,7 @@ function testCipher2(key) {
 
 
 function testCipher3(key, iv) {
-  // Test encyrption and decryption with explicit key and iv
+  // Test encryption and decryption with explicit key and iv
   const plaintext =
       '32|RmVZZkFUVmpRRkp0TmJaUm56ZU9qcnJkaXNNWVNpTTU*|iXmckfRWZBGWWELw' +
       'eCBsThSsfUHLeRe0KCsK8ooHgxie0zOINpXxfZi/oNG7uq9JWFVCk70gfzQH8ZUJ' +
@@ -496,7 +496,7 @@ function testCipher3(key, iv) {
 
 
 function testCipher4(key, iv) {
-  // Test encyrption and decryption with explicit key and iv
+  // Test encryption and decryption with explicit key and iv
   const plaintext =
       '32|RmVZZkFUVmpRRkp0TmJaUm56ZU9qcnJkaXNNWVNpTTU*|iXmckfRWZBGWWELw' +
       'eCBsThSsfUHLeRe0KCsK8ooHgxie0zOINpXxfZi/oNG7uq9JWFVCk70gfzQH8ZUJ' +
diff --git a/test/parallel/test-crypto-cipheriv-decipheriv.js b/test/parallel/test-crypto-cipheriv-decipheriv.js
index 6f22dbe71affb1..a03a25d511fe16 100644
--- a/test/parallel/test-crypto-cipheriv-decipheriv.js
+++ b/test/parallel/test-crypto-cipheriv-decipheriv.js
@@ -9,7 +9,7 @@ if (!common.hasCrypto) {
 const crypto = require('crypto');
 
 function testCipher1(key, iv) {
-  // Test encyrption and decryption with explicit key and iv
+  // Test encryption and decryption with explicit key and iv
   const plaintext =
           '32|RmVZZkFUVmpRRkp0TmJaUm56ZU9qcnJkaXNNWVNpTTU*|iXmckfRWZBGWWELw' +
           'eCBsThSsfUHLeRe0KCsK8ooHgxie0zOINpXxfZi/oNG7uq9JWFVCk70gfzQH8ZUJ' +
@@ -41,7 +41,7 @@ function testCipher1(key, iv) {
 
 
 function testCipher2(key, iv) {
-  // Test encyrption and decryption with explicit key and iv
+  // Test encryption and decryption with explicit key and iv
   const plaintext =
           '32|RmVZZkFUVmpRRkp0TmJaUm56ZU9qcnJkaXNNWVNpTTU*|iXmckfRWZBGWWELw' +
           'eCBsThSsfUHLeRe0KCsK8ooHgxie0zOINpXxfZi/oNG7uq9JWFVCk70gfzQH8ZUJ' +
diff --git a/test/parallel/test-event-emitter-add-listeners.js b/test/parallel/test-event-emitter-add-listeners.js
index 33125daabdb3b3..81af3fd50c8b50 100644
--- a/test/parallel/test-event-emitter-add-listeners.js
+++ b/test/parallel/test-event-emitter-add-listeners.js
@@ -5,8 +5,8 @@ const EventEmitter = require('events');
 
 {
   const ee = new EventEmitter();
-  const events_new_listener_emited = [];
-  const listeners_new_listener_emited = [];
+  const events_new_listener_emitted = [];
+  const listeners_new_listener_emitted = [];
 
   // Sanity check
   assert.strictEqual(ee.addListener, ee.on);
@@ -16,8 +16,8 @@ const EventEmitter = require('events');
     if (event === 'newListener')
       return;
 
-    events_new_listener_emited.push(event);
-    listeners_new_listener_emited.push(listener);
+    events_new_listener_emitted.push(event);
+    listeners_new_listener_emitted.push(listener);
   });
 
   const hello = common.mustCall(function(a, b) {
@@ -33,8 +33,8 @@ const EventEmitter = require('events');
 
   ee.on('hello', hello);
   ee.once('foo', common.fail);
-  assert.deepStrictEqual(['hello', 'foo'], events_new_listener_emited);
-  assert.deepStrictEqual([hello, common.fail], listeners_new_listener_emited);
+  assert.deepStrictEqual(['hello', 'foo'], events_new_listener_emitted);
+  assert.deepStrictEqual([hello, common.fail], listeners_new_listener_emitted);
 
   ee.emit('hello', 'a', 'b');
 }
diff --git a/test/parallel/test-fs-access.js b/test/parallel/test-fs-access.js
index b03bf572f6a5bd..d5934dd614ec04 100644
--- a/test/parallel/test-fs-access.js
+++ b/test/parallel/test-fs-access.js
@@ -32,11 +32,11 @@ createFileWithPerms(readWriteFile, 0o666);
  *
  * There's not really any point in resetting the process' user id to 0 after
  * changing it to 'nobody', since in the case that the test runs without
- * superuser priviledge, it is not possible to change its process user id to
+ * superuser privilege, it is not possible to change its process user id to
  * superuser.
  *
  * It can prevent the test from removing files created before the change of user
- * id, but that's fine. In this case, it is the responsability of the
+ * id, but that's fine. In this case, it is the responsibility of the
  * continuous integration platform to take care of that.
  */
 let hasWriteAccessForReadonlyFile = false;
diff --git a/test/parallel/test-process-no-deprecation.js b/test/parallel/test-process-no-deprecation.js
index 60394ea0d38ddf..4d4dfa86fb67ad 100644
--- a/test/parallel/test-process-no-deprecation.js
+++ b/test/parallel/test-process-no-deprecation.js
@@ -1,7 +1,7 @@
 'use strict';
 // Flags: --no-warnings
 
-// The --no-warnings flag only supresses writing the warning to stderr, not the
+// The --no-warnings flag only suppresses writing the warning to stderr, not the
 // emission of the corresponding event. This test file can be run without it.
 
 const common = require('../common');
diff --git a/test/parallel/test-stream-readable-needReadable.js b/test/parallel/test-stream-readable-needReadable.js
index 48229edd202333..be397dc5dc5f74 100644
--- a/test/parallel/test-stream-readable-needReadable.js
+++ b/test/parallel/test-stream-readable-needReadable.js
@@ -74,7 +74,7 @@ const slowProducer = new Readable({
 
 slowProducer.on('readable', common.mustCall(() => {
   if (slowProducer.read(8) === null) {
-    // The buffer doesn't have enough data, and the stream is not ened,
+    // The buffer doesn't have enough data, and the stream is not need,
     // we need to notify the reader when data arrives.
     assert.strictEqual(slowProducer._readableState.needReadable, true);
   } else {
diff --git a/test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js b/test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js
index f42144360b6941..5d57bbaae0011e 100644
--- a/test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js
+++ b/test/parallel/test-timers-socket-timeout-removes-other-socket-unref-timer.js
@@ -25,7 +25,7 @@ const server = net.createServer(function onClient(client) {
       clients[1].end();
     });
 
-    // Use a delay that is higher than the lowest timer resolution accross all
+    // Use a delay that is higher than the lowest timer resolution across all
     // supported platforms, so that the two timers don't fire at the same time.
     clients[1].setTimeout(50);
   }
diff --git a/test/parallel/test-tls-check-server-identity.js b/test/parallel/test-tls-check-server-identity.js
index 5c89ef8bf4d425..9439735ce069b4 100644
--- a/test/parallel/test-tls-check-server-identity.js
+++ b/test/parallel/test-tls-check-server-identity.js
@@ -177,7 +177,7 @@ const tests = [
     error: 'Host: a.b.a.com. is not in the cert\'s altnames: ' +
            'DNS:*b.a.com'
   },
-  // Mutliple DNS names
+  // Multiple DNS names
   {
     host: 'a.b.a.com', cert: {
       subjectaltname: 'DNS:*b.a.com, DNS:a.b.a.com',