Synonyms and related words :
Cain, Jack Ketch, apache, assassin, assassinator, beheader, bloodletter, bloodshedder, bravo, burker, butcher, button man, cannibal, chastizer, cutthroat, deathsman, desperado, discipliner, electrocutioner, eradicator, executioner, exterminator, garroter, gorilla, gun, gunman, gunsel, hangman, hatchet man, head-hunter, headsman, hit man, homicidal maniac, homicide, killer, man-eater, man-killer, manslayer, massacrer, matador, murderer, pesticide, poison, poisoner, punisher, slaughterer, slayer, thug, torpedo, trigger man