asylum vs sanctuary

asylum and sanctuary both are nouns.

Word	Noun	Adjective	Verb	Adverb
asylum	Yes	No	No	No
sanctuary	Yes	No	No	No

As nouns, asylum and sanctuary are synonyms defined as:

Other synonyms of asylum include refuge.

asylum (noun)	sanctuary (noun)
a hospital for mentally incompetent or unbalanced person	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 shelter from danger or hardship
	a consecrated place where sacred objects are kept