pledger vs actor

pledger and actor both are nouns.

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

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

Other hypernyms of pledger include doer, worker.

pledger (noun)	actor (noun)
someone who makes or gives a pledge	a theatrical performer
	a person who acts and gets things done