fortification Synonyms

bulwark fortress citadel munition ravelin redan redoubt reenforcement reinforcement scarp securement acropolises rampart presidio parapet parados palisade outwork machicolation lunette spane spiking cloud buster munitions defences defenses Walls mol crenellation rearmament weaponry wall vallation tenaille support stronghold strengthener strengthening stockade keep invulnerableness garrison cheval-de-frise chateau castle castellation buttressing bunker breastwork bolstering