dun

Pampedun, or Pandon, was probably a place of residence from the earliest times; its sheltered situation for boats, and proximity to the ancient way over the river, protected perhaps by a dun or camp, on the height above … possibly gave origin to the ancient name of the place, Pampedun, from the British pant, a hollow, and dun, a fort or camp, Pant-y-dun.

Smaller than the broch was the dun, another type of stone-built 'roundhouse'.