accuser vs controversialist

accuser and controversialist both are nouns.

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

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

accuser: someone who imputes guilt or blame
controversialist: a person who disputes; who is good at or enjoys controversy

Other hypernyms of accuser include disputant, eristic.

accuser (noun)	controversialist (noun)
someone who imputes guilt or blame	a person who disputes; who is good at or enjoys controversy