(a.) Tending to subvert; having a tendency to overthrow and ruin.

Bolshevik Bolshevist Bolshie Carbonarist Carbonaro Castroist Castroite Charley Communist Cong Fenian Guevarist Jacobin Leninist Maoist Marxist Mau-Mau Puritan Red Red Republican Roundhead Sinn Feiner Trojan horse Trotskyist Trotskyite VC Vietcong Wobbly Yankee Yankee Doodle agitator altered anarch anarchist anarchistic anarcho-syndicalist baneful better bonnet rouge brawler breakaway calamitous cataclysmal cataclysmic catastrophic changeable changed collaborationist collaborator consuming consumptive converted criminal syndicalist crypto deadly defector degenerate demolishing demolitionary depredatory desolating destroying destructive devastating deviant disastrous dissident divergent doomful extreme extreme left-winger extremist extremistic factious fatal fateful fellow traveler fifth column fifth columnist fraternizer fratricidal frondeur improved insubordinate insurgent insurrectionary insurrectionist insurrecto internecine left-wing extremist lunatic fringe malcontent maverick metamorphosed metastasized mild radical mildly radical modified mutant mutineer mutineering mutinous nihilist nihilistic nonconformist parlor Bolshevik parlor pink pink pinko qualified quisling radical ravaging rebel rebellious rebuilt red reformed renewed revived revolter revolutional revolutionary revolutionary junta revolutioner revolutionist revolutionizer rioter riotous ruining ruinous saboteur sans-culotte sans-culottist security risk seditionary seditious self-destructive subversionary suicidal syndicalist terrorist traitor traitorous transformed translated transmuted treacherous treasonable treasonous turbulent ultra ultraconservative ultraist ultraistic underground unmitigated vandalic vandalish vandalistic wasteful wasting withering worse yippie