confidentiality vs confidential

confidentiality is a noun but confidential is not a noun.

Word	Noun	Adjective	Verb	Adverb
confidentiality	Yes	No	No	No
confidential	No	Yes	No	No

confidentiality (noun)	confidential (noun)
discretion in keeping secret information
the state of being secret

confidentiality (adjective)	confidential (adjective)
	the level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified
	denoting confidence or intimacy
	entrusted with private information and the confidence of another
	(of information) given in confidence or in secret