entrance hall vs foyer

entrance hall and foyer both are nouns.

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

As nouns, entrance hall and foyer are synonyms defined as:

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

entrance hall (noun)	foyer (noun)
a large entrance or reception room or area	a large entrance or reception room or area