mental vs mentality

mental is not a noun while mentality is a noun.

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

mental (noun)	mentality (noun)
	mental ability
	a habitual or characteristic mental attitude that determines how you will interpret and respond to situations

mental (adjective)	mentality (adjective)
involving the mind or an intellectual process
of or relating to the mind
of or relating to the chin- or liplike structure in insects and certain mollusks
of or relating to the chin or median part of the lower jaw
affected by a disorder of the mind