hold back vs forbear

hold back is not a noun while forbear is a noun.

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

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

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

Other hypernyms of hold back include refrain.

hold back (noun)	forbear (noun)
	a person from whom you are descended

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