cavum vs complex body part

cavum and complex body part both are nouns.

Word	Noun	Adjective	Verb	Adverb
cavum	Yes	No	No	No
complex body part	Yes	No	No	No

As nouns, complex body part is a hypernym of cavum; that is, complex body part is a word with a broader meaning than cavum:

cavum: (anatomy) a natural hollow or sinus within the body
complex body part: a particular complex anatomical part of a living thing and its construction and arrangement

Other hypernyms of cavum include anatomical structure, bodily structure, body structure, structure.

cavum (noun)	complex body part (noun)
(anatomy) a natural hollow or sinus within the body	a particular complex anatomical part of a living thing and its construction and arrangement