social reformer vs meliorist

social reformer and meliorist both are nouns.

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

As nouns, social reformer and meliorist are synonyms defined as:

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

social reformer (noun)	meliorist (noun)
a disputant who advocates reform	a disputant who advocates reform