paunch vs potbelly

paunch and potbelly both are nouns.

Word	Noun	Adjective	Verb	Adverb
paunch	Yes	No	No	No
potbelly	Yes	No	No	No

As nouns, potbelly is a hyponym of paunch; that is, potbelly is a word with a more specific, narrower meaning than paunch:

Other hyponyms of paunch include bay window, corporation, pot, tummy.

paunch (noun)	potbelly (noun)
a protruding abdomen	a bulbous stove in which wood or coal is burned
	slang for a paunch