onanist vs doer

onanist and doer both are nouns.

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

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

Other hypernyms of onanist include actor, worker.

onanist (noun)	doer (noun)
a person who practices masturbation	a person who acts and gets things done