exterminator (n.)

• annihilator
• apache
• arsonist
• assassin
• assassinator
• bomber
• bravo
• burner
• butcher
• cannibal
• cutthroat
• desperado
• destroyer
• dynamiter
• eradicator
• executioner
• garroter
• gorilla
• gun
• gunman
• homicide
• hun
• iconoclast
• killer
• man-eater
• manslayer
• matador
• murderer
• nihilist
• pesticide
• poison
• poisoner
• ruiner
• slaughterer
• slayer
• strangler
• syndicalist
• terrorist
• thug
• torpedo
• vandal
• wrecker