peritoneal cavity vs cavity

peritoneal cavity and cavity both are nouns.

Word	Noun	Adjective	Verb	Adverb
peritoneal cavity	Yes	No	No	No
cavity	Yes	No	No	No

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

peritoneal cavity: the interior of the peritoneum; a potential space between layers of the peritoneum
cavity: (anatomy) a natural hollow or sinus within the body

Other hypernyms of peritoneal cavity include bodily cavity, cavum.

peritoneal cavity (noun)	cavity (noun)
the interior of the peritoneum; a potential space between layers of the peritoneum	(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