tumefy vs belly

tumefy is not a noun while belly is a noun.

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

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

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

tumefy (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

tumefy (verb)	belly (verb)
expand abnormally	swell out or bulge out
cause to become very swollen