mental vs unhealthy

mental and unhealthy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
mental	No	Yes	No	No
unhealthy	No	Yes	No	No

mental (adjective)	unhealthy (adjective)
involving the mind or an intellectual process	not in or exhibiting good health in body or mind
of or relating to the mind	not conducive to good health
of or relating to the chin- or liplike structure in insects and certain mollusks	detrimental to health
of or relating to the chin or median part of the lower jaw
affected by a disorder of the mind