social reformer vs crusader

social reformer and crusader both are nouns.

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

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

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

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