hippy vs meliorist

hippy and meliorist both are nouns.

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

As nouns, meliorist is a hypernym of hippy; that is, meliorist is a word with a broader meaning than hippy:

hippy: someone who rejects the established culture; advocates extreme liberalism in politics and lifestyle
meliorist: a disputant who advocates reform

Other hypernyms of hippy include crusader, reformer, reformist, social reformer.

hippy (noun)	meliorist (noun)
someone who rejects the established culture; advocates extreme liberalism in politics and lifestyle	a disputant who advocates reform