tympanites vs distention

tympanites and distention both are nouns.

Word	Noun	Adjective	Verb	Adverb
tympanites	Yes	No	No	No
distention	Yes	No	No	No

As nouns, distention is a hypernym of tympanites; that is, distention is a word with a broader meaning than tympanites:

tympanites: distension of the abdomen that is caused by the accumulation of gas in the intestines or the peritoneal cavity
distention: the state of being stretched beyond normal dimensions

Other hypernyms of tympanites include dilatation, distension.

tympanites (noun)	distention (noun)
distension of the abdomen that is caused by the accumulation of gas in the intestines or the peritoneal cavity	the act of expanding by pressure from within
	the state of being stretched beyond normal dimensions