hall vs foyer

hall and foyer both are nouns.

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

As nouns, hall and foyer are synonyms defined as:

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

hall (noun)	foyer (noun)
a large building for meetings or entertainment	a large entrance or reception room or area
a large room for gatherings, receiving guests, or entertainment
an interior passage or corridor onto which rooms open
a college or university building containing living quarters for students
a large entrance or reception room or area
the large room of a manor or castle
a large and imposing house
a large building used by a college or university for teaching or research