mental faculty vs faculty

mental faculty and faculty both are nouns.

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

As nouns, mental faculty and faculty are synonyms defined as:

mental faculty and faculty: one of the inherent cognitive or perceptual powers of the mind

Other synonyms of mental faculty include module.

mental faculty (noun)	faculty (noun)
one of the inherent cognitive or perceptual powers of the mind	one of the inherent cognitive or perceptual powers of the mind
	the body of teachers and administrators at a school