foyer vs vestibule

foyer and vestibule both are nouns.

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

As nouns, foyer and vestibule are synonyms defined as:

Other synonyms of foyer include antechamber, anteroom, entrance hall, hall, lobby.

foyer (noun)	vestibule (noun)
a large entrance or reception room or area	a large entrance or reception room or area
	any of various bodily cavities leading to another cavity (as of the ear or vagina)