cornu vs body structure

cornu and body structure both are nouns.

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

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

cornu: (anatomy) any structure that resembles a horn in shape
body structure: a particular complex anatomical part of a living thing and its construction and arrangement

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

cornu (noun)	body structure (noun)
(anatomy) any structure that resembles a horn in shape	a particular complex anatomical part of a living thing and its construction and arrangement