buccal cavity vs cavity

buccal cavity and cavity both are nouns.

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

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

Other hypernyms of buccal cavity include bodily cavity, cavum.

buccal cavity (noun)	cavity (noun)
the cavity between the jaws and the cheeks	(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