diff --git a/stdlib/@tests/stubtest_allowlists/common.txt b/stdlib/@tests/stubtest_allowlists/common.txt
index 5f8c42c70..1ffeeadd8 100644
--- a/stdlib/@tests/stubtest_allowlists/common.txt
+++ b/stdlib/@tests/stubtest_allowlists/common.txt
@@ -90,9 +90,6 @@ xml.sax.expatreader
 # ==========
 _json.encode_basestring
 _thread.RLock
-_thread.allocate
-_thread.exit_thread
-_thread.start_new
 _threading_local._localimpl.localargs
 _threading_local._localimpl.locallock
 builtins.SyntaxError.print_file_and_line
diff --git a/stdlib/_thread.pyi b/stdlib/_thread.pyi
index b75e7608f..f0b70ed2a 100644
--- a/stdlib/_thread.pyi
+++ b/stdlib/_thread.pyi
@@ -44,6 +44,12 @@ def start_new_thread(function: Callable[[Unpack[_Ts]], object], args: tuple[Unpa
 @overload
 def start_new_thread(function: Callable[..., object], args: tuple[Any, ...], kwargs: dict[str, Any], /) -> int: ...
 
+# Obsolete synonym for start_new_thread()
+@overload
+def start_new(function: Callable[[Unpack[_Ts]], object], args: tuple[Unpack[_Ts]], /) -> int: ...
+@overload
+def start_new(function: Callable[..., object], args: tuple[Any, ...], kwargs: dict[str, Any], /) -> int: ...
+
 if sys.version_info >= (3, 10):
     def interrupt_main(signum: signal.Signals = ..., /) -> None: ...
 
@@ -51,7 +57,9 @@ else:
     def interrupt_main() -> None: ...
 
 def exit() -> NoReturn: ...
+def exit_thread() -> NoReturn: ...  # Obsolete synonym for exit()
 def allocate_lock() -> LockType: ...
+def allocate() -> LockType: ...  # Obsolete synonym for allocate_lock()
 def get_ident() -> int: ...
 def stack_size(size: int = 0, /) -> int: ...