unwelcome person vs worker

unwelcome person and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
unwelcome person	Yes	No	No	No
worker	Yes	No	No	No

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

Other hypernyms of unwelcome person include actor, doer.

unwelcome person (noun)	worker (noun)
a person who for some reason is not wanted or welcome	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