restrainer vs worker

restrainer and worker both are nouns.

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

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

Other hypernyms of restrainer include actor, doer.

restrainer (noun)	worker (noun)
a person who directs and restrains	sterile member of a colony of social insects that forages for food and cares for the larvae
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 works at a specific occupation
	a member of the working class (not necessarily employed)
	a person who acts and gets things done