pledgee vs doer

pledgee and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
pledgee	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of pledgee; that is, doer is a word with a broader meaning than pledgee:

pledgee: someone to whom a pledge is made or someone with whom something is deposited as a pledge
doer: a person who acts and gets things done

Other hypernyms of pledgee include actor, worker.

pledgee (noun)	doer (noun)
someone to whom a pledge is made or someone with whom something is deposited as a pledge	a person who acts and gets things done