moderationist vs doer

moderationist and doer both are nouns.

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

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

Other hypernyms of moderationist include actor, worker.

moderationist (noun)	doer (noun)
a person who takes a position in the political center	a person who acts and gets things done
a moderate drinker (as opposed to a total abstainer)