good guy vs worker

good guy and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
good guy	Yes	No	No	No
worker	Yes	No	No	No

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

Other hypernyms of good guy include actor, doer.

good guy (noun)	worker (noun)
any person who is on your side	sterile member of a colony of social insects that forages for food and cares for the larvae
	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