diff --git a/CHANGELOG.md b/CHANGELOG.md
index c303495af990b..fc79f27731e14 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2891,7 +2891,7 @@ Latest
     @_silgen_name("foo") @objc
     ```
 
-  The `,` was vestigial when the attribute syntax consisted of bracked lists.
+  The `,` was vestigial when the attribute syntax consisted of bracket lists.
 
 * `switch` now always requires a statement after a `case` or `default`.
 
@@ -3106,7 +3106,7 @@ Latest
   inference (e.g. when passing a function argument).
 
 * Properties defined in classes are now dynamically dispatched and can be
-  overriden with `@override`.  Currently `@override` only works with computed properties
+  overridden with `@override`.  Currently `@override` only works with computed properties
   overriding other computed properties, but this will be enhanced in coming weeks.
 
 
@@ -3190,7 +3190,7 @@ Latest
     ```
 
 * The compiler now warns about cases where a variable is inferred to have
-  `AnyObject`, `AnyClass`, or `()` type, since type inferrence can turn a simple
+  `AnyObject`, `AnyClass`, or `()` type, since type inference can turn a simple
   mistake (e.g. failing to cast an `AnyObject` when you meant to) into something
   with ripple effects.  Here is a simple example:
 
@@ -3386,7 +3386,7 @@ Latest
   `#if` block.
 
   Target configurations are tested against their values via a pseudo-function
-  invocation expression, taking a single argument expressed as an identitifer.
+  invocation expression, taking a single argument expressed as an identifier.
   The argument represents certain static build-time information.
 
   There are currently two supported target configurations:
@@ -4708,7 +4708,7 @@ Latest
     ```
 
 * Attribute syntax has been redesigned (see **(rdar://10700853)** and
-  **(rdar://14462729)**) so that attributes now preceed the declaration and use
+  **(rdar://14462729)**) so that attributes now precede the declaration and use
   the `@` character to signify them.  Where before you might have written:
 
     ```swift
@@ -4830,7 +4830,7 @@ Latest
     ```
 
   checks whether `object` has a value and, if so, asks for the length of
-  its title.  `titleLength` wil have type `Int?`, and if `object` was
+  its title.  `titleLength` will have type `Int?`, and if `object` was
   missing, the variable will be initialized to None.
 
 * Objects with type `id` can now be used as the receiver of property
@@ -5293,5 +5293,5 @@ Latest
 
 * `POSIX.EnvironmentVariables` and `swift.CommandLineArguments` global variables
   were merged into a `swift.Process` variable.  Now you can access command line
-  arguments with `Process.arguments`.  In order to acces environment variables
+  arguments with `Process.arguments`.  In order to access environment variables
   add `import POSIX` and use `Process.environmentVariables`.
diff --git a/docs/doxygen.css b/docs/doxygen.css
index 83951f673db8d..d5691ed7e62d1 100644
--- a/docs/doxygen.css
+++ b/docs/doxygen.css
@@ -313,8 +313,8 @@ HR { height: 1px;
 
 /* 
  * LLVM Modifications.
- * Note: Everything above here is generated with "doxygen -w htlm" command. See
- * "doxygen --help" for details. What follows are CSS overrides for LLVM 
+ * Note: Everything above here is generated with "doxygen -w html" command. See
+ * "doxygen --help" for details. What follows are CSS overrides for LLVM
  * specific formatting. We want to keep the above so it can be replaced with
  * subsequent doxygen upgrades.
  */
diff --git a/include/swift/SIL/SILInstruction.h b/include/swift/SIL/SILInstruction.h
index f5fff6a3514e6..505af2a7926a9 100644
--- a/include/swift/SIL/SILInstruction.h
+++ b/include/swift/SIL/SILInstruction.h
@@ -864,7 +864,7 @@ class ApplyInst : public ApplyInstBase<ApplyInst, SILInstruction> {
     return V->getKind() == ValueKind::ApplyInst;
   }
   
-  /// Returns true if the called function has an error result but is not actully
+  /// Returns true if the called function has an error result but is not actually
   /// throwing an error.
   bool isNonThrowing() const {
     return isNonThrowingApply();
diff --git a/lib/AST/ArchetypeBuilder.cpp b/lib/AST/ArchetypeBuilder.cpp
index fe7aafddc3f21..f3305d27e3c48 100644
--- a/lib/AST/ArchetypeBuilder.cpp
+++ b/lib/AST/ArchetypeBuilder.cpp
@@ -854,7 +854,7 @@ bool ArchetypeBuilder::addSameTypeRequirementBetweenArchetypes(
   T1 = T1->getRepresentative();
   T2 = T2->getRepresentative();
 
-  // If the representives are already the same, we're done.
+  // If the representatives are already the same, we're done.
   if (T1 == T2)
     return false;
 
diff --git a/lib/AST/ConformanceLookupTable.cpp b/lib/AST/ConformanceLookupTable.cpp
index e109506048cf4..a063ac5977c9a 100644
--- a/lib/AST/ConformanceLookupTable.cpp
+++ b/lib/AST/ConformanceLookupTable.cpp
@@ -543,7 +543,7 @@ ConformanceLookupTable::Ordering ConformanceLookupTable::compareConformances(
                                    bool &diagnoseSuperseded) {
   // If one entry is fixed and the other is not, we have our answer.
   if (lhs->isFixed() != rhs->isFixed()) {
-    // If the non-fixed conformance is not replacable, we have a failure to
+    // If the non-fixed conformance is not replaceable, we have a failure to
     // diagnose.
     diagnoseSuperseded = (lhs->isFixed() &&
                           !isReplaceable(rhs->getRankingKind())) ||
diff --git a/lib/AST/Verifier.cpp b/lib/AST/Verifier.cpp
index 937ecc1ac440d..3c8d0681f25e6 100644
--- a/lib/AST/Verifier.cpp
+++ b/lib/AST/Verifier.cpp
@@ -436,7 +436,7 @@ struct ASTNodeBase {};
             return false;
 
           // We should know about archetypes corresponding to opened
-          // existerntial archetypes.
+          // existential archetypes.
           if (archetype->getOpenedExistentialType()) {
             if (OpenedExistentialArchetypes.count(archetype) == 0) {
               Out << "Found opened existential archetype "
diff --git a/utils/swift-bench.py b/utils/swift-bench.py
index 893ddbca28354..f083f12816b2a 100644
--- a/utils/swift-bench.py
+++ b/utils/swift-bench.py
@@ -26,7 +26,7 @@
 #   o When all files are compiled, the harness begins to run the tests. The
 #     harness chooses a number of iterations for each tests to achieve the best
 #     accuracy in the given time limit (in order to do that, it performs several
-#     auxiliary test runs). When the iteration number is chosen, the measurent
+#     auxiliary test runs). When the iteration number is chosen, the measurement
 #     of execution time is actually performed.
 #   o At this point everything is ready, and the harness simply reports the
 #     results.