meliorist vs reformer

meliorist and reformer both are nouns.

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

As nouns, meliorist and reformer are synonyms defined as:

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

meliorist (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