hold out vs hold back

hold out and hold back both are verbs.

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

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

Other hypernyms of hold out include hold off, wait.

hold out (verb)	hold back (verb)
thrust or extend out	prevent the action or expression of
stand up or offer resistance to somebody or something	hold back, as of a danger or an enemy; check the expansion or influence of
continue to live and avoid dying	hold back; keep from being perceived by others
last and be usable	secure and keep for possible future use or application
wait uncompromisingly for something desirable	wait before acting
	refrain from doing