diff --git a/libcxx/CMakeLists.txt b/libcxx/CMakeLists.txt
--- a/libcxx/CMakeLists.txt
+++ b/libcxx/CMakeLists.txt
@@ -524,7 +524,7 @@
 
   # When building the dylib, don't warn for unavailable aligned allocation
   # functions based on the deployment target -- they are always available
-  # because they are provided by the dylib itself with the excepton of z/OS.
+  # because they are provided by the dylib itself with the exception of z/OS.
   if (ZOS)
     target_add_compile_flags_if_supported(${target} PRIVATE -fno-aligned-allocation)
   else()
diff --git a/libcxx/include/__config b/libcxx/include/__config
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -771,7 +771,7 @@
 #  if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
 #    if __has_attribute(deprecated)
 #      define _LIBCPP_DEPRECATED __attribute__((deprecated))
-#      define _LIBCPP_DEPRECATED_(m) __attribute__((deprected(m)))
+#      define _LIBCPP_DEPRECATED_(m) __attribute__((deprecated(m)))
 #    elif _LIBCPP_STD_VER > 11
 #      define _LIBCPP_DEPRECATED [[deprecated]]
 #      define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]]
diff --git a/libcxx/src/support/runtime/stdexcept_vcruntime.ipp b/libcxx/src/support/runtime/stdexcept_vcruntime.ipp
--- a/libcxx/src/support/runtime/stdexcept_vcruntime.ipp
+++ b/libcxx/src/support/runtime/stdexcept_vcruntime.ipp
@@ -7,7 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #ifndef _LIBCPP_ABI_VCRUNTIME
-#error This file may only be used when defering to vcruntime
+#error This file may only be used when deferring to vcruntime
 #endif
 
 namespace std {
diff --git a/libcxx/test/libcxx/utilities/optional/optional.object/triviality.abi.pass.cpp b/libcxx/test/libcxx/utilities/optional/optional.object/triviality.abi.pass.cpp
--- a/libcxx/test/libcxx/utilities/optional/optional.object/triviality.abi.pass.cpp
+++ b/libcxx/test/libcxx/utilities/optional/optional.object/triviality.abi.pass.cpp
@@ -13,7 +13,7 @@
 // This test asserts the triviality of special member functions of optional<T>
 // whenever T has these special member functions trivial. The goal of this test
 // is to make sure that we do not change the triviality of those, since that
-// constitues an ABI break (small enough optionals would be passed by registers).
+// constitutes an ABI break (small enough optionals would be passed by registers).
 //
 // constexpr optional(const optional& rhs);
 // constexpr optional(optional&& rhs) noexcept(see below);
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.context/format.context/ctor.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.context/format.context/ctor.pass.cpp
--- a/libcxx/test/std/utilities/format/format.formatter/format.context/format.context/ctor.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.context/format.context/ctor.pass.cpp
@@ -18,7 +18,7 @@
 // basic_format_context(Out out,
 //                      basic_format_args<basic_format_context> args,
 //                      std::optional<std::::locale>&& loc = std::nullopt);
-// If compliled with -D_LIBCPP_HAS_NO_LOCALIZATION
+// If compiled with -D_LIBCPP_HAS_NO_LOCALIZATION
 // basic_format_context(Out out,
 //                      basic_format_args<basic_format_context> args);
 
diff --git a/libcxx/test/support/format_string.h b/libcxx/test/support/format_string.h
--- a/libcxx/test/support/format_string.h
+++ b/libcxx/test/support/format_string.h
@@ -9,7 +9,7 @@
 
 namespace format_string_detail {
 inline std::string format_string_imp(const char* msg, ...) {
-  // we might need a second shot at this, so pre-emptivly make a copy
+  // we might need a second shot at this, so pre-emptively make a copy
   struct GuardVAList {
     va_list& xtarget;
     bool active;
diff --git a/libcxx/utils/libcxx/test/dsl.py b/libcxx/utils/libcxx/test/dsl.py
--- a/libcxx/utils/libcxx/test/dsl.py
+++ b/libcxx/utils/libcxx/test/dsl.py
@@ -604,7 +604,7 @@
   Parameters are used to customize the behavior of test suites in a user
   controllable way. There are two ways of setting the value of a Parameter.
   The first one is to pass `--param <KEY>=<VALUE>` when running Lit (or
-  equivalenlty to set `litConfig.params[KEY] = VALUE` somewhere in the
+  equivalently to set `litConfig.params[KEY] = VALUE` somewhere in the
   Lit configuration files. This method will set the parameter globally for
   all test suites being run.