rampart

A defensive mound of earth or a wall with a broad top and usually a stone parapet; a wall-like ridge of earth, stones or debris; an embankment for defensive purpose.

Between the southern end of the village, called Bridge End, and the River Thames runs a double row of ramparts and a ditch known as Dyke Hills.

A defensive structure; a protective barrier; a bulwark.

That which defends against intrusion from outside; a protection.

A steep bank of a river or gorge.

To defend with a rampart; fortify or surround with a rampart.

Those grassy Hills, those glitt’ring Dells Proudly ramparted with rocks