meatus vs passageway

meatus and passageway both are nouns.

Word	Noun	Adjective	Verb	Adverb
meatus	Yes	No	No	No
passageway	Yes	No	No	No

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

meatus: a natural body passageway
passageway: a path or channel or duct through or along which something may pass

Other hypernyms of meatus include passage.

meatus (noun)	passageway (noun)
a natural body passageway	a passage between rooms or between buildings
	a path or channel or duct through or along which something may pass