demonstrator vs reformist

demonstrator and reformist both are nouns.

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

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

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

demonstrator (noun)	reformist (noun)
someone who participates in a public display of group feeling	a disputant who advocates reform
someone who demonstrates an article to a prospective buyer
a teacher or teacher's assistant who demonstrates the principles that are being taught

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