gatherer vs doer

gatherer and doer both are nouns.

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

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

Other hypernyms of gatherer include actor, worker.

gatherer (noun)	doer (noun)
a person who is employed to collect payments (as for rent or taxes)	a person who acts and gets things done
a person who gathers