rampart
Definitions
A defensive wall of a castle or walled city, having a broad top with a walkway and typically a stone parapet.
A protective barrier or bulwark.
Examples
The soldiers stood guard along the stone rampart as the enemy approached.
The ancient castle's crumbling rampart offered a panoramic view of the valley below.
Synonyms
bulwark fortification parapet embankment barricade defensive wall breastwork
Antonyms
opening breach gap passageway vulnerability weakness exposure