nasal cavity vs cavum

nasal cavity and cavum both are nouns.

Word	Noun	Adjective	Verb	Adverb
nasal cavity	Yes	No	No	No
cavum	Yes	No	No	No

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

nasal cavity: either of the two cavities lying between the floor of the cranium and the roof of the mouth and extending from the face to the pharynx
cavum: (anatomy) a natural hollow or sinus within the body

Other hypernyms of nasal cavity include bodily cavity, cavity.

nasal cavity (noun)	cavum (noun)
either of the two cavities lying between the floor of the cranium and the roof of the mouth and extending from the face to the pharynx	(anatomy) a natural hollow or sinus within the body