diff --git a/crates/objc2/CHANGELOG.md b/crates/objc2/CHANGELOG.md
index ed3c0c89b..02818835b 100644
--- a/crates/objc2/CHANGELOG.md
+++ b/crates/objc2/CHANGELOG.md
@@ -44,6 +44,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 * Relaxed the requirements for receivers in `MethodImplementation`; now,
   anything that implements `MessageReceiver` can be used as the receiver of
   a method.
+* **BREAKING**: Renamed the associated types `Ret` and `Args` on
+  `MethodImplementation` to `Return` and `Arguments`.
 
 ### Deprecated
 * Soft deprecated using `msg_send!` without a comma between arguments (i.e.
diff --git a/crates/objc2/src/declare/mod.rs b/crates/objc2/src/declare/mod.rs
index ab6324266..a58b8908a 100644
--- a/crates/objc2/src/declare/mod.rs
+++ b/crates/objc2/src/declare/mod.rs
@@ -241,7 +241,7 @@ impl ClassBuilder {
     /// `-release` used by ARC, will not be present otherwise.
     pub fn root<F>(name: &str, intitialize_fn: F) -> Option<Self>
     where
-        F: MethodImplementation<Callee = AnyClass, Args = (), Ret = ()>,
+        F: MethodImplementation<Callee = AnyClass, Arguments = (), Return = ()>,
     {
         Self::with_superclass(name, None).map(|mut this| {
             unsafe { this.add_class_method(sel!(initialize), intitialize_fn) };
@@ -274,8 +274,8 @@ impl ClassBuilder {
         unsafe {
             self.add_method_inner(
                 sel,
-                F::Args::ENCODINGS,
-                &F::Ret::ENCODING_RETURN,
+                F::Arguments::ENCODINGS,
+                &F::Return::ENCODING_RETURN,
                 func.__imp(),
             )
         }
@@ -338,8 +338,8 @@ impl ClassBuilder {
         unsafe {
             self.add_class_method_inner(
                 sel,
-                F::Args::ENCODINGS,
-                &F::Ret::ENCODING_RETURN,
+                F::Arguments::ENCODINGS,
+                &F::Return::ENCODING_RETURN,
                 func.__imp(),
             )
         }
diff --git a/crates/objc2/src/runtime/method_implementation.rs b/crates/objc2/src/runtime/method_implementation.rs
index 73e2dd1b6..1c80ba24a 100644
--- a/crates/objc2/src/runtime/method_implementation.rs
+++ b/crates/objc2/src/runtime/method_implementation.rs
@@ -19,10 +19,12 @@ mod private {
 pub trait MethodImplementation: private::Sealed + Sized {
     /// The callee type of the method.
     type Callee: ?Sized + RefEncode;
-    /// The return type of the method.
-    type Ret: EncodeReturn;
+
     /// The argument types of the method.
-    type Args: EncodeArguments;
+    type Arguments: EncodeArguments;
+
+    /// The return type of the method.
+    type Return: EncodeReturn;
 
     #[doc(hidden)]
     fn __imp(self) -> Imp;
@@ -44,8 +46,8 @@ macro_rules! method_impl_inner {
             $($t: EncodeArgument,)*
         {
             type Callee = T::__Inner;
-            type Ret = R;
-            type Args = ($($t,)*);
+            type Arguments = ($($t,)*);
+            type Return = R;
 
             fn __imp(self) -> Imp {
                 // SAFETY: Transmuting to an `unsafe` function pointer
@@ -66,8 +68,8 @@ macro_rules! method_impl_inner {
             $($t: EncodeArgument,)*
         {
             type Callee = T;
-            type Ret = IdReturnValue;
-            type Args = ($($t,)*);
+            type Arguments = ($($t,)*);
+            type Return = IdReturnValue;
 
             fn __imp(self) -> Imp {
                 // SAFETY: `Allocated<T>` is the same as `NonNull<T>`, except