passageway vs complex body part

passageway and complex body part both are nouns.

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

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

passageway: a path or channel or duct through or along which something may pass
complex body part: a particular complex anatomical part of a living thing and its construction and arrangement

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

passageway (noun)	complex body part (noun)
a passage between rooms or between buildings	a particular complex anatomical part of a living thing and its construction and arrangement
a path or channel or duct through or along which something may pass