keep back vs hold back

keep back and hold back both are verbs.

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

As verbs, keep back and hold back are synonyms defined as:

Other synonyms of keep back include keep, restrain.

As verbs, keep back and hold back are synonyms defined as:

keep back and hold back: secure and keep for possible future use or application

Other synonyms of keep back include hold, retain.

keep back (verb)	hold back (verb)
prevent the action or expression of	prevent the action or expression of
hold back; refuse to hand over or share	hold back, as of a danger or an enemy; check the expansion or influence of
secure and keep for possible future use or application	hold back; keep from being perceived by others
	secure and keep for possible future use or application
	wait before acting
	refrain from doing