diff --git a/src/execution/isolate.cc b/src/execution/isolate.cc
index 7a0f3189cc..bd0453b2b7 100644
--- a/src/execution/isolate.cc
+++ b/src/execution/isolate.cc
@@ -693,7 +693,7 @@ StackTraceFailureMessage::StackTraceFailureMessage(
     FixedStringAllocator fixed(&js_stack_trace_[0], buffer_length - 1);
     StringStream accumulator(&fixed, StringStream::kPrintObjectConcise);
     isolate->PrintStack(&accumulator, Isolate::kPrintStackVerbose);
-    // Keeping a reference to the last code objects to increase likelyhood that
+    // Keeping a reference to the last code objects to increase likelihood that
     // they get included in the minidump.
     const size_t code_objects_length = arraysize(code_objects_);
     size_t i = 0;
@@ -4069,13 +4069,13 @@ void Isolate::AddCrashKeysForIsolateAndHeapPointers() {
   }
   const v8::StartupData* data = Snapshot::DefaultSnapshotBlob();
   // TODO(cbruni): Implement strategy to infrequently collect this.
-  const uint32_t v8_snapshot_checkum_calculated = 0;
+  const uint32_t v8_snapshot_checksum_calculated = 0;
   add_crash_key_callback_(v8::CrashKeyId::kSnapshotChecksumCalculated,
-                          ToHexString(v8_snapshot_checkum_calculated));
-  const uint32_t v8_snapshot_checkum_expected =
+                          ToHexString(v8_snapshot_checksum_calculated));
+  const uint32_t v8_snapshot_checksum_expected =
       Snapshot::GetExpectedChecksum(data);
   add_crash_key_callback_(v8::CrashKeyId::kSnapshotChecksumExpected,
-                          ToHexString(v8_snapshot_checkum_expected));
+                          ToHexString(v8_snapshot_checksum_expected));
 }
 
 void Isolate::InitializeCodeRanges() {
@@ -4614,7 +4614,7 @@ bool Isolate::Init(SnapshotData* startup_snapshot_data,
                                 nullptr);
 
   // Isolate initialization allocates long living objects that should be
-  // pretentured to old space.
+  // pretenured to old space.
   DCHECK_IMPLIES(heap()->new_space(), (heap()->new_space()->Size() == 0) &&
                                           (heap()->gc_count() == 0));
 
@@ -5132,7 +5132,7 @@ MaybeHandle<JSPromise> Isolate::RunHostImportModuleDynamicallyCallback(
             ToApiHandle<v8::FixedArray>(import_assertions_array)),
         MaybeHandle<JSPromise>());
   } else {
-    // TODO(cbruni, v8:12302): Avoid creating tempory ScriptOrModule objects.
+    // TODO(cbruni, v8:12302): Avoid creating temporary ScriptOrModule objects.
     auto script_or_module = i::Handle<i::ScriptOrModule>::cast(
         this->factory()->NewStruct(i::SCRIPT_OR_MODULE_TYPE));
     script_or_module->set_resource_name(*resource_name);
diff --git a/src/execution/isolate.h b/src/execution/isolate.h
index ef389a4b11..78895afe10 100644
--- a/src/execution/isolate.h
+++ b/src/execution/isolate.h
@@ -553,7 +553,7 @@ using DebugObjectCache = std::vector<Handle<HeapObject>>;
   inline type name() const { return thread_local_top()->name##_; }
 
 #define THREAD_LOCAL_TOP_ADDRESS(type, name) \
-  type* name##_address() { return &thread_local_top()->name##_; }
+  inline type* name##_address() { return &thread_local_top()->name##_; }
 
 // HiddenFactory exists so Isolate can privately inherit from it without making
 // Factory's members available to Isolate directly.
@@ -681,7 +681,7 @@ class V8_EXPORT_PRIVATE Isolate final : private HiddenFactory {
   // at the same time, this should be prevented using external locking.
   void Enter();
 
-  // Exits the current thread. The previosuly entered Isolate is restored
+  // Exits the current thread. The previously entered Isolate is restored
   // for the thread.
   // Not thread-safe. Multiple threads should not Enter/Exit the same isolate
   // at the same time, this should be prevented using external locking.
@@ -1519,7 +1519,7 @@ class V8_EXPORT_PRIVATE Isolate final : private HiddenFactory {
     DCHECK_NOT_NULL(optimizing_compile_dispatcher_);
     return optimizing_compile_dispatcher_;
   }
-  // Flushes all pending concurrent optimzation jobs from the optimizing
+  // Flushes all pending concurrent optimization jobs from the optimizing
   // compile dispatcher's queue.
   void AbortConcurrentOptimization(BlockingBehavior blocking_behavior);
 
@@ -1728,7 +1728,8 @@ class V8_EXPORT_PRIVATE Isolate final : private HiddenFactory {
   const uint8_t* embedded_blob_data() const;
   uint32_t embedded_blob_data_size() const;
 
-  // Returns true if short bultin calls optimization is enabled for the Isolate.
+  // Returns true if short builtin calls optimization is enabled for the
+  // Isolate.
   bool is_short_builtin_calls_enabled() const {
     return V8_SHORT_BUILTIN_CALLS_BOOL && is_short_builtin_calls_enabled_;
   }
@@ -2297,7 +2298,7 @@ class V8_EXPORT_PRIVATE Isolate final : private HiddenFactory {
   // True if this isolate was initialized from a snapshot.
   bool initialized_from_snapshot_ = false;
 
-  // True if short bultin calls optimization is enabled.
+  // True if short builtin calls optimization is enabled.
   bool is_short_builtin_calls_enabled_ = false;
 
   // True if the isolate is in background. This flag is used
@@ -2555,6 +2556,7 @@ extern thread_local Isolate* g_current_isolate_ V8_CONSTINIT;
 
 #undef FIELD_ACCESSOR
 #undef THREAD_LOCAL_TOP_ACCESSOR
+#undef THREAD_LOCAL_TOP_ADDRESS
 
 // SaveContext scopes save the current context on the Isolate on creation, and
 // restore it on destruction.
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index b0ba3fa847..49bd3ad759 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -3937,8 +3937,8 @@ void Heap::NotifyObjectSizeChange(
 void Heap::UpdateInvalidatedObjectSize(HeapObject object, int new_size) {
   if (!MayContainRecordedSlots(object)) return;
 
-  // Updating invalidated_slots is unsychronized and thus needs to happen on the
-  // main thread.
+  // Updating invalidated_slots is unsynchronized and thus needs to happen on
+  // the main thread.
   DCHECK_NULL(LocalHeap::Current());
   DCHECK_EQ(isolate()->thread_id(), ThreadId::Current());