beater vs worker

beater and worker both are nouns.

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

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

beater (noun)	worker (noun)
an implement for beating	sterile member of a colony of social insects that forages for food and cares for the larvae
a worker who rouses wild game from under cover for a hunter	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