omental bursa vs cavity

omental bursa and cavity both are nouns.

Word	Noun	Adjective	Verb	Adverb
omental bursa	Yes	No	No	No
cavity	Yes	No	No	No

As nouns, cavity is a hypernym of omental bursa; that is, cavity is a word with a broader meaning than omental bursa:

omental bursa: an isolated part of the peritoneal cavity that is dorsal to the stomach
cavity: (anatomy) a natural hollow or sinus within the body

Other hypernyms of omental bursa include bodily cavity, cavum.

omental bursa (noun)	cavity (noun)
an isolated part of the peritoneal cavity that is dorsal to the stomach	(anatomy) a natural hollow or sinus within the body
	a sizeable hole (usually in the ground)
	soft decayed area in a tooth; progressive decay can lead to the death of a tooth
	space that is surrounded by something