passageway vs corridor

passageway and corridor both are nouns.

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

As nouns, corridor is a hyponym of passageway; that is, corridor is a word with a more specific, narrower meaning than passageway:

Other hyponyms of passageway include aisle, gangway, arcade, areaway, drift, gallery, heading, gangway, gate, shaft, tunnel, walk-through.

passageway (noun)	corridor (noun)
a passage between rooms or between buildings	an enclosed passageway; rooms usually open onto it
a path or channel or duct through or along which something may pass