killer

[1]	murderer , slayer , assassin , slayer , cutthroat , butcher , exterminator , Bluebeard , (Jack the) ripper , (Slang) (US) torpedo , hit man , triggerman , gunsel , hooligan , gunfighter , iceman , hatchet man
[2]	(Slang) (Old-fashioned) bee's knees , cause of death , (US) humdinger , doozy , killer-diller (from Manila) , lallapalooza/lollapalooza , lulu , daisy , dilly
[3]	killer whale , orca , grampus , sea wolf , Orcinus orca