dreadnaught

/D R EH1 D N AO1 T/
noun
  1. 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. 2

    A type of warship heavier in armour or armament than a typical battleship

  3. 3

    One that is the largest or the most powerful of its kind.

  4. 4

    A garment made of thick woollen cloth that can defend against storm and cold.

  5. 5

    The cloth itself; fearnaught.

  6. 6

    A person who fears nothing.

  7. 7

    Something that assures against fear.

Source: https://en.wiktionary.org/wiki/dreadnaught, https://en.wiktionary.org/wiki/dreadnought