church building vs sanctuary

church building and sanctuary both are nouns.

Word	Noun	Adjective	Verb	Adverb
church building	Yes	No	No	No
sanctuary	Yes	No	No	No

church building (noun)	sanctuary (noun)
a place for public (especially Christian) worship	area around the altar of a church for the clergy and choir; often enclosed by a lattice or railing
	a shelter from danger or hardship
	a consecrated place where sacred objects are kept