Synonyms for agitator

instigator, fomenter, reformer, revolutionary, radical, revisionist, anarchist, rabble-rouser, demagogue, dogmatist, malcontent, disrupter, heretic, fighter, propagandist, ringleader, stormy petrel, zealous advocate, firebrand, incendiary, soapbox orator, active supporter, active partisan, ardent champion, exciter of public debate, troublemaker, agent, provocateur, agent provocateur (both French), organizer, sans-culotte, dissident, fifth columnist*; see also conservative, radical, rebel 1.