conceal vs hold back

conceal and hold back both are verbs.

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

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

Other synonyms of conceal include hold in.

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