intumesce vs belly

intumesce is not a noun while belly is a noun.

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

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

Other hyponyms of intumesce include distend, belly out, blow up, puff, puff out, puff up, bloat, blister, vesicate.

intumesce (noun)	belly (noun)
	the underpart of the body of certain vertebrates such as snakes or fish
	the region of the body of a vertebrate between the thorax and the pelvis
	a protruding abdomen
	the hollow inside of something
	a part that bulges deeply

intumesce (verb)	belly (verb)
expand abnormally	swell out or bulge out
move upwards in bubbles, as from the effect of heating; also used metaphorically