trigger on 'cw' as long as it's not in the middle of the word

bot.py

@@ -1,7 +1,10 @@
 import discord
 import io
+import re
 import sys
 
+SPOILER_REGEX = re.compile(r'spoil|\bcw\b', re.IGNORECASE)
+
 client = discord.Client()
 
 def mentions_me(message):
@@ -16,7 +19,7 @@ async def on_message(message):
     if message.author == client.user:
         return
 
-    if (('spoil' in message.content.lower() or mentions_me(message))
+    if ((SPOILER_REGEX.search(message.content) or mentions_me(message))
         and message.attachments
         and not any(a.is_spoiler() for a in message.attachments)):
 
@@ -63,7 +66,7 @@ async def on_message(message):
             print('error deleting message: {0}'.format(e))
             return
     elif mentions_me(message):
-        await message.channel.send("upload an image and put 'spoil' anywhere in the description, and I'll spoiler it for you. to delete your post, add a :x: react to it.")
+        await message.channel.send("upload an image and put 'spoil' or 'cw' (doesn't have to be lowercase) anywhere in the description, and I'll spoiler it for you. to delete your post, add a :x: react to it.")
 
 @client.event
 async def on_reaction_add(reaction, user):