resister vs controversialist

resister and controversialist both are nouns.

Word	Noun	Adjective	Verb	Adverb
resister	Yes	No	No	No
controversialist	Yes	No	No	No

As nouns, controversialist is a hypernym of resister; that is, controversialist is a word with a broader meaning than resister:

resister: someone who systematically obstructs some action that others want to take
controversialist: a person who disputes; who is good at or enjoys controversy

Other hypernyms of resister include disputant, eristic.

resister (noun)	controversialist (noun)
someone who systematically obstructs some action that others want to take	a person who disputes; who is good at or enjoys controversy
someone who offers opposition