concha vs complex body part

concha and complex body part both are nouns.

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

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

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

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

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