cavity vs anatomical structure

cavity and anatomical structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
cavity	Yes	No	No	No
anatomical structure	Yes	No	No	No

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

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

Other hypernyms of cavity include bodily structure, body structure, complex body part, structure.

cavity (noun)	anatomical 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
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