entrance hall vs building

entrance hall and building both are nouns.

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

entrance hall (noun)	building (noun)
a large entrance or reception room or area	the act of constructing something
	the commercial activity involved in repairing old structures or constructing new ones
	a structure that has a roof and walls and stands more or less permanently in one place
	the occupants of a building