mutineer vs insurrectionist

mutineer and insurrectionist both are nouns.

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

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

mutineer: someone who is openly rebellious and refuses to obey authorities (especially seamen or soldiers)
insurrectionist: a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions)

Other hypernyms of mutineer include freedom fighter, insurgent, rebel.

mutineer (noun)	insurrectionist (noun)
someone who is openly rebellious and refuses to obey authorities (especially seamen or soldiers)	a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions)