passageway vs fauces

passageway and fauces both are nouns.

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

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

passageway: a path or channel or duct through or along which something may pass
fauces: the passage between the back of the mouth and the pharynx

passageway (noun)	fauces (noun)
a passage between rooms or between buildings	the passage between the back of the mouth and the pharynx
a path or channel or duct through or along which something may pass