costa vs complex body part

costa and complex body part both are nouns.

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

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

costa: a riblike part of a plant or animal (such as a middle rib of a leaf or a thickened vein of an insect wing)
complex body part: a particular complex anatomical part of a living thing and its construction and arrangement

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

costa (noun)	complex body part (noun)
any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)	a particular complex anatomical part of a living thing and its construction and arrangement
a riblike part of a plant or animal (such as a middle rib of a leaf or a thickened vein of an insect wing)