demon vs worker

demon and worker both are nouns.

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

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

Other hypernyms of demon include actor, doer.

demon (noun)	worker (noun)
an evil supernatural being	sterile member of a colony of social insects that forages for food and cares for the larvae
a cruel wicked and inhuman person	a person who works at a specific occupation
someone extremely diligent or skillful	a member of the working class (not necessarily employed)
	a person who acts and gets things done