gunman (n.)

• adventurer
• apache
• archer
• artilleryman
• assassin
• assassinator
• bowman
• bravo
• bully
• bullyboy
• butcher
• cannibal
• cannoneer
• carabineer
• cutthroat
• deadeye
• desperado
• devil
• eradicator
• executioner
• exterminator
• garroter
• gorilla
• gun
• gunner
• gunslinger
• hellcat
• hireling
• homicide
• hunter
• killer
• man-eater
• manslayer
• marksman
• matador
• mercenary
• murderer
• musketeer
• pesticide
• poison
• poisoner
• rifleman
• rough
• rowdy
• ruffian
• sharpshooter
• shooter
• shot
• slaughterer
• slayer
• sniper
• strangler
• thug
• torpedo
• trapshooter