gatekeeper vs actor

gatekeeper and actor both are nouns.

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

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

Other hypernyms of gatekeeper include doer, worker.

gatekeeper (noun)	actor (noun)
someone who guards an entrance	a theatrical performer
someone who controls access to something	a person who acts and gets things done