- Q-boat: A type of warship disguised as a merchant vessel that would lure German U-boats to the surface and then attack them.
- Quartermaster: A military rank or position responsible for managing supplies and equipment.
- Queen Elizabeth: A British battleship that saw action in World War 2.
- Quisling: A term for a person who collaborates with the enemy or occupies enemy territory.
- Quickfire: A type of artillery weapon that can fire rapidly.