cavum vs body structure

cavum and body structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
cavum	Yes	No	No	No
body structure	Yes	No	No	No

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

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

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

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