mental home vs mental institution

mental home and mental institution both are nouns.

Word	Noun	Adjective	Verb	Adverb
mental home	Yes	No	No	No
mental institution	Yes	No	No	No

As nouns, mental home and mental institution are synonyms defined as:

mental home and mental institution: a hospital for mentally incompetent or unbalanced person

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

mental home (noun)	mental institution (noun)
a hospital for mentally incompetent or unbalanced person	a hospital for mentally incompetent or unbalanced person