namer vs doer

namer and doer both are nouns.

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

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

Other hypernyms of namer include actor, worker.

namer (noun)	doer (noun)
a person who gives a name or names	a person who acts and gets things done