vestibule vs room

vestibule and room both are nouns.

Word	Noun	Adjective	Verb	Adverb
vestibule	Yes	No	No	No
room	Yes	No	Yes	No

As nouns, room is a hypernym of vestibule; that is, room is a word with a broader meaning than vestibule:

vestibule (noun)	room (noun)
a large entrance or reception room or area	an area within a building enclosed by walls and floor and ceiling
any of various bodily cavities leading to another cavity (as of the ear or vagina)	the people who are present in a room
	space for movement
	opportunity for

vestibule (verb)	room (verb)
	live and take one's meals at or in