A destructive agent
annihilator, wrecker, vandal, exterminator, iconoclast, nihilist, assassin, executioner, hangman, strangler, butcher, slayer, gunman, decapitator, guillotiner, slaughterer, cutthroat, lyncher, anarchist, terrorist, firebrand, incendiary, arsonist, pyromaniac, bomber, desperado, scourge, dealer of destruction, demolisher, defacer, ruiner, eradicator, despoiler, ransacker, pillager, looter, savage, plague, pestilence, rust, cancer, acid, bane, canker, wild beast, poison, virus, fungus, hatchet man*, Goth*, Hun*, Nazi*; see also arsonist, criminal, killer, weapon 1.
Antonyms author*, restorer, creator.