belly vs potbelly

belly and potbelly both are nouns.

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

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

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

belly (noun)	potbelly (noun)
the underpart of the body of certain vertebrates such as snakes or fish	a bulbous stove in which wood or coal is burned
the region of the body of a vertebrate between the thorax and the pelvis	slang for a paunch
a protruding abdomen
the hollow inside of something
a part that bulges deeply

belly (verb)	potbelly (verb)
swell out or bulge out