The sounding of a bell when the gates open.
To hear the gun shot at the start of the race
One compound word that starts with gun is gunpowder
gun grenade gatling gun
The devils gun
uzi submachine gun
AR-15
The primer
Ak47
gun (the starter's gun)
Radar gun.
Cowboy Hat Cowboy boots Rope Toy Horse Toy Gun Guitar
The "starter"