gun

a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)

large but transportable armament

a person who shoots a gun (as regards their ability)

a professional killer who uses a gun

a hand-operated pump that resembles a revolver; forces grease into parts of a machine

a pedal that controls the throttle valve; "he stepped on the gas"

the discharge of a firearm as signal or as a salute in military ceremonies; "two runners started before the gun"; "a twenty gun salute"

shoot with a gun