withholder vs actor

withholder and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
withholder	Yes	No	No	No
actor	Yes	No	No	No

As nouns, actor is a hypernym of withholder; that is, actor is a word with a broader meaning than withholder:

Other hypernyms of withholder include doer, worker.

withholder (noun)	actor (noun)
a person who restrains or checks or holds back	a theatrical performer
a person who refrains from granting	a person who acts and gets things done