carpal tunnel vs passageway

carpal tunnel and passageway both are nouns.

Word	Noun	Adjective	Verb	Adverb
carpal tunnel	Yes	No	No	No
passageway	Yes	No	No	No

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

carpal tunnel: a passageway in the wrist through which nerves and the flexor muscles of the hands pass
passageway: a path or channel or duct through or along which something may pass

Other hypernyms of carpal tunnel include passage.

carpal tunnel (noun)	passageway (noun)
a passageway in the wrist through which nerves and the flexor muscles of the hands pass	a passage between rooms or between buildings
	a path or channel or duct through or along which something may pass