(n.) One engaged in effecting a change of government; a favorer of revolution.

Bolshevik Bolshevist Bolshie Carbonarist Carbonaro Castroist Castroite Charley Communist Cong Fenian Guevarist Jacobin Jacobinic Leninist Maoist Marxist Mau-Mau Puritan Red Red Republican Roundhead Sinn Feiner Trotskyist Trotskyite VC Vietcong Wobbly Yankee Yankee Doodle agin the government agitator anarch anarchic anarchist anarchistic anarcho-syndicalist antinomian bonnet rouge brawler criminal syndicalist extreme extreme left-winger extremist extremistic fanatic frondeur insubordinate insurgent insurrectionary insurrectionist insurrecto left-wing extremist lunatic fringe malcontent maverick mild radical mildly radical mutineer nihilist nihilistic nonconformist parlor Bolshevik parlor pink pink pinko rabid radical rebel red revolter revolutional revolutionary revolutionary junta revolutioner revolutionizer rioter sans-culotte sans-culottic sans-culottish sans-culottist subversive syndicalist terrorist traitor ultra ultraconservative ultraist ultraistic yippie