mental hospital vs asylum

mental hospital and asylum both are nouns.

Word	Noun	Adjective	Verb	Adverb
mental hospital	Yes	No	No	No
asylum	Yes	No	No	No

As nouns, mental hospital and asylum are synonyms defined as:

mental hospital and asylum: a hospital for mentally incompetent or unbalanced person

Other synonyms of mental hospital include insane asylum, institution, mental home, mental institution, psychiatric hospital.

mental hospital (noun)	asylum (noun)
a hospital for mentally incompetent or unbalanced person	a hospital for mentally incompetent or unbalanced person
	a shelter from danger or hardship