Escarpment

n.

1.

A steep descent or declivity; steep face or edge of a ridge; ground about a fortified place, cut away nearly vertically to prevent hostile approach. See Scarp.

Noun	1.	escarpment - a long steep slope or cliff at the edge of a plateau or ridge; usually formed by erosion Synonyms: scarp
	2.	escarpment - a steep artificial slope in front of a fortification Synonyms: escarp, protective embankment, scarp

abatis, advanced work, balistraria, bank, banquette, barbed-wire entanglement, barbican, barricade, barrier, bartizan, bastion, battlement, bluff, breastwork, bulwark, casemate, cheval-de-frise, circumvallation, cliff, contravallation, counterscarp, crag, curtain, demibastion, dike, drawbridge, earthwork, enclosure, entanglement, escarp, face, fence, fieldwork, fortalice, fortification, glacis, loophole, lunette, machicolation, mantelet, merlon, mound, outwork, palisade, palisades, parados, parapet, portcullis, postern gate, precipice, rampart, ravelin, redan, redoubt, sally port, scar, scarp, sconce, steep, stockade, tenaille, vallation, vallum, wall, work