diff --git a/changelog/260.feature.2.rst b/changelog/260.feature.2.rst
index fb1c42fdee..7abeb8d277 100644
--- a/changelog/260.feature.2.rst
+++ b/changelog/260.feature.2.rst
@@ -1 +1 @@
-|commands| Add :class:`AppCommandRegistrationError`.
+|commands| Add :class:`ApplicationCommandRegistrationError`.
diff --git a/disnake/ext/commands/errors.py b/disnake/ext/commands/errors.py
index e7ecd8cf28..515951ffda 100644
--- a/disnake/ext/commands/errors.py
+++ b/disnake/ext/commands/errors.py
@@ -75,7 +75,7 @@
     "ExtensionFailed",
     "ExtensionNotFound",
     "CommandRegistrationError",
-    "AppCommandRegistrationError",
+    "ApplicationCommandRegistrationError",
     "FlagError",
     "BadFlagArgument",
     "MissingFlagArgument",
@@ -1026,7 +1026,7 @@ def __init__(self, name: str, *, alias_conflict: bool = False) -> None:
 
 # we inherit CommandRegistrationError for backwards compatibility,
 # because this error replaced CommandRegistrationError in several places
-class AppCommandRegistrationError(CommandRegistrationError):
+class ApplicationCommandRegistrationError(CommandRegistrationError):
     """An exception raised when the app command can't be added
     because a command with the same key already exists.
     A key is determined by command type, name, and guild_id.
@@ -1052,6 +1052,8 @@ def __init__(
         self.cmd_type: ApplicationCommandType = cmd_type
         self.name: str = name
         self.guild_id: Optional[int] = guild_id
+        # backwards compatibility
+        self.alias_conflict: bool = False
         # fixed API naming here because no one calls slash commands "chat input"
         type_ = "slash" if cmd_type is ApplicationCommandType.chat_input else cmd_type.name
         if guild_id is None:
diff --git a/disnake/ext/commands/interaction_bot_base.py b/disnake/ext/commands/interaction_bot_base.py
index 576f047674..4c69f06335 100644
--- a/disnake/ext/commands/interaction_bot_base.py
+++ b/disnake/ext/commands/interaction_bot_base.py
@@ -40,7 +40,7 @@
     message_command,
     user_command,
 )
-from .errors import AppCommandRegistrationError
+from .errors import ApplicationCommandRegistrationError
 from .flags import CommandSyncFlags
 from .slash_core import InvokableSlashCommand, SubCommand, SubCommandGroup, slash_command
 
@@ -347,7 +347,7 @@ def add_app_command(self, app_command: InvokableApplicationCommand) -> None:
 
         Raises
         ------
-        AppCommandRegistrationError
+        ApplicationCommandRegistrationError
             The app command is already registered.
         TypeError
             The app command passed is not an instance of :class:`InvokableApplicationCommand`.
@@ -371,7 +371,7 @@ def add_app_command(self, app_command: InvokableApplicationCommand) -> None:
                 type=app_command.body.type, name=app_command.name, guild_id=guild_id
             )
             if cmd_index in self.all_app_commands:
-                raise AppCommandRegistrationError(
+                raise ApplicationCommandRegistrationError(
                     cmd_index.type, cmd_index.name, cmd_index.guild_id
                 )
 
diff --git a/docs/ext/commands/api/exceptions.rst b/docs/ext/commands/api/exceptions.rst
index 4dd874f51e..094ac5dbbc 100644
--- a/docs/ext/commands/api/exceptions.rst
+++ b/docs/ext/commands/api/exceptions.rst
@@ -186,7 +186,7 @@ Exceptions
 .. autoexception:: CommandRegistrationError
     :members:
 
-.. autoexception:: AppCommandRegistrationError
+.. autoexception:: ApplicationCommandRegistrationError
     :members:
 
 
@@ -255,6 +255,7 @@ Exception Hierarchy
             - :exc:`ExtensionNotFound`
     - :exc:`~.ClientException`
         - :exc:`CommandRegistrationError`
+            - :exc:`ApplicationCommandRegistrationError`
 
 Warnings
 --------