demander vs doer

demander and doer both are nouns.

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

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

Other hypernyms of demander include actor, worker.

demander (noun)	doer (noun)
a person who makes demands	a person who acts and gets things done