deny vs keep back

deny and keep back both are verbs.

Word	Noun	Adjective	Verb	Adverb
deny	No	No	Yes	No
keep back	No	No	Yes	No

As verbs, keep back is a hyponym of deny; that is, keep back is a word with a more specific, narrower meaning than deny:

Other hyponyms of deny include withhold.

As verbs, keep back is a hypernym of deny; that is, keep back is a word with a broader meaning than deny:

Other hypernyms of deny include withhold.

deny (verb)	keep back (verb)
declare untrue; contradict	prevent the action or expression of
refuse to accept or believe	hold back; refuse to hand over or share
refuse to recognize or acknowledge	secure and keep for possible future use or application
deny formally (an allegation of fact by the opposing party) in a legal suit
refuse to let have
refuse to grant, as of a petition or request
deny oneself (something); restrain, especially from indulging in some pleasure