[n] a stronghold that is reinforced for protection from enemy fire; with apertures for defensive fire
acropolis, bastion, beachhead, box, bridgehead, bungalow, bunker, cabin, castle, chalet, citadel, cot, cote, cottage, donjon, fasthold, fastness, fort, fortress, garrison, garrison house, hold, keep, lodge, log cabin, love nest, martello, martello tower,