insurrectionist vs meliorist

insurrectionist and meliorist both are nouns.

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

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

insurrectionist: a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions)
meliorist: a disputant who advocates reform

Other hypernyms of insurrectionist include crusader, reformer, reformist, social reformer, revolutionary, revolutionist, subversive, subverter.

insurrectionist (noun)	meliorist (noun)
a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions)	a disputant who advocates reform