differentiator vs doer

differentiator and doer both are nouns.

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

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

Other hypernyms of differentiator include actor, worker.

differentiator (noun)	doer (noun)
a person who (or that which) differentiates	a person who acts and gets things done