gatekeeper vs worker

gatekeeper and worker both are nouns.

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

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

Other hypernyms of gatekeeper include actor, doer.

gatekeeper (noun)	worker (noun)
someone who guards an entrance	sterile member of a colony of social insects that forages for food and cares for the larvae
someone who controls access to something	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