Dreadnought

noun

1. A battleship, especially of the World War I era, in which most of the firepower is concentrated in large guns that are of the same caliber.
2. A type of warship heavier in armour or armament than a typical battleship
3. One that is the largest or the most powerful of its kind.
4. A garment made of thick woollen cloth that can defend against storm and cold.
5. The cloth itself; fearnaught.