gunman

From gun +‎ -man.

gunman (plural gunmen)

1. A criminal armed with a gun, especially a professional killer.
   • 1921, Zane Grey, chapter 5, in To The Last Man:

     "I've known a heap of gun fighters in my day. An' Jean Isbel don't ran true to class. Shore there never was a gunman who'd risk cripplin' his right hand by sluggin' anybody."

2. (sometimes derogatory) An American.

• lone gunman

• gunwoman