controller vs worker

controller and worker both are nouns.

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

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

Other hypernyms of controller include actor, doer.

controller (noun)	worker (noun)
a mechanism that controls the operation of a machine	sterile member of a colony of social insects that forages for food and cares for the larvae
someone who maintains and audits business accounts	a person who works at a specific occupation
a person who directs and restrains	a member of the working class (not necessarily employed)
	a person who acts and gets things done