confidentiality vs secrecy

confidentiality and secrecy both are nouns.

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

As nouns, secrecy is a hypernym of confidentiality; that is, secrecy is a word with a broader meaning than confidentiality:

Other hypernyms of confidentiality include concealment, privacy, privateness.

confidentiality (noun)	secrecy (noun)
discretion in keeping secret information	the trait of keeping things secret
the state of being secret	the condition of being concealed or hidden