Utopian vs social reformer

Utopian and social reformer both are nouns.

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

As nouns, social reformer is a hypernym of Utopian; that is, social reformer is a word with a broader meaning than Utopian:

Other hypernyms of Utopian include crusader, meliorist, reformer, reformist.

Utopian (noun)	social reformer (noun)
an idealistic (but usually impractical) social reformer	a disputant who advocates reform

Utopian (adjective)	social reformer (adjective)
of or pertaining to or resembling a utopia