restrainer vs actor

restrainer and actor both are nouns.

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

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

Other hypernyms of restrainer include doer, worker.

restrainer (noun)	actor (noun)
a person who directs and restrains	a theatrical performer
a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film	a person who acts and gets things done