Crapper
Part of speech: noun
Definition: A water closet containing a flushable toilet, especially a toilet fixture identified "T. Crapper", a well known Victorian-era English engineer and plumbing installer, Thomas Crapper. A flush toilet, a commode. A privy, an outhouse.
Potty
Part of speech: noun
Definition: A chamberpot used by young children while learning control of their bladder and bowels.
Part of speech: adjective
Definition: Insane.
Example sentence: Before you have kids, you can blow up and get mad, then you have kids and they teach you the opposite. You have to be patient when you're helping - whether it's with school work or potty training, it's a whole other level of patience.