Synonyms and related words :
Cain, apache, assassin, assassinator, bloodletter, bloodshedder, bravo, burker, butcher, button man, cannibal, cutthroat, desperado, eradicator, executioner, exterminator, garroter, gorilla, gun, gunman, gunsel, gunslinger, hatchet man, head-hunter, homicidal maniac, homicide, killer, man-eater, man-killer, manslayer, massacrer, matador, murderer, pesticide, poison, poisoner, slaughterer, slayer, strangler, thug, torpedo, trigger man,