bad guy vs worker

bad guy and worker both are nouns.

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

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

Other hypernyms of bad guy include actor, doer.

bad guy (noun)	worker (noun)
any person who is not 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