environmentalist vs reformist

environmentalist and reformist both are nouns.

Word	Noun	Adjective	Verb	Adverb
environmentalist	Yes	No	No	No
reformist	Yes	Yes	No	No

As nouns, reformist is a hypernym of environmentalist; that is, reformist is a word with a broader meaning than environmentalist:

environmentalist: someone who works to protect the environment from destruction or pollution
reformist: a disputant who advocates reform

Other hypernyms of environmentalist include crusader, meliorist, reformer, social reformer.

environmentalist (noun)	reformist (noun)
someone who works to protect the environment from destruction or pollution	a disputant who advocates reform

environmentalist (adjective)	reformist (adjective)
	favoring or promoting reform (often by government action)