stranger vs worker

stranger and worker both are nouns.

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

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

Other hypernyms of stranger include actor, doer.

stranger (noun)	worker (noun)
anyone who does not belong in the environment in which they are found	sterile member of a colony of social insects that forages for food and cares for the larvae
an individual that one is not acquainted with	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