opponent vs worker

opponent and worker both are nouns.

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

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

Other hypernyms of opponent include actor, doer.

opponent (noun)	worker (noun)
someone who offers opposition	sterile member of a colony of social insects that forages for food and cares for the larvae
a contestant that you are matched against	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

opponent (adjective)	worker (adjective)
characterized by active hostility