Cain, apache, assassin, assassinator, bloodletter, bloodshedder, bravo, bruiser, burker, butcher, button man, cannibal, cutthroat, desperado, eradicator, executioner, exterminator, garroter, goon, gorilla, gun, gunman, gunsel, hatchet man, head-hunter, hellion, hit man, holy terror, homicidal maniac, homicide, hood, hoodlum, hooligan, killer, man-eater, man-killer, manslayer, massacrer, matador, mug, mugger, murderer, muscle man, pesticide, plug-ugly, poison, poisoner, rodman, roughneck, slaughterer, slayer, strangler, strong-arm man, terror, thug, torpedo, tough, ugly customer