gunman
- n a professional killer who uses a gun
- n a person who shoots a gun (as regards their ability)
gunmetal
- n a type of bronze used for parts subject to wear or corrosion (especially corrosion by sea water)
gunnel
- n wale at the top of the side of boat; topmost planking of a wooden vessel
- n small eellike fishes common in shallow waters of the northern Atlantic
gunnery sergeant
- n a noncommissioned officer ranking above a staff sergeant in the marines
gunplay
- n a fight involving shooting small arms with the intent to kill or frighten
gunpowder
- n a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks
gunpowder plot
- n a conspiracy in 1605 in England to blow up James I and the Houses of Parliament to avenge the persecution of Catholics in England; led by Guy Fawkes