reformist vs reformer

reformist and reformer both are nouns.

Word	Noun	Adjective	Verb	Adverb
reformist	Yes	Yes	No	No
reformer	Yes	No	No	No

As nouns, reformist and reformer are synonyms defined as:

Other synonyms of reformist include crusader, meliorist, social reformer.

reformist (noun)	reformer (noun)
a disputant who advocates reform	an apparatus that reforms the molecular structure of hydrocarbons to produce richer fuel
	a disputant who advocates reform

reformist (adjective)	reformer (adjective)
favoring or promoting reform (often by government action)