fighter vs worker

fighter and worker both are nouns.

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

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

Other hypernyms of fighter include actor, doer.

fighter (noun)	worker (noun)
a high-speed military or naval airplane designed to destroy enemy aircraft in the air	sterile member of a colony of social insects that forages for food and cares for the larvae
someone who fights (or is fighting)	a person who works at a specific occupation
someone who fights for a cause	a member of the working class (not necessarily employed)
	a person who acts and gets things done