leader vs actor

leader and actor both are nouns.

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

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

Other hypernyms of leader include doer, worker.

leader (noun)	actor (noun)
a featured article of merchandise sold at a loss in order to draw customers	a theatrical performer
a person who rules or guides or inspires others	a person who acts and gets things done