hold back vs keep back

hold back and keep back both are verbs.

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

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

Other synonyms of hold back include keep, restrain.

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

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

Other synonyms of hold back include hold, retain.

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