retention vs faculty

retention and faculty both are nouns.

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

As nouns, faculty is a hypernym of retention; that is, faculty is a word with a broader meaning than retention:

Other hypernyms of retention include mental faculty, module.

retention (noun)	faculty (noun)
the act of retaining something	one of the inherent cognitive or perceptual powers of the mind
the power of retaining liquid	the body of teachers and administrators at a school
the power of retaining and recalling past experience