escarpment

English Thesaurus

1. a steep artificial slope in front of a fortification (noun.artifact)

hypernym	:	fortification, munition,
definition	:	defensive structure consisting of walls or mounds built around a stronghold to strengthen it (noun.artifact)

2. a long steep slope or cliff at the edge of a plateau or ridge; usually formed by erosion (noun.object)

hypernym	:	incline, side, slope,
definition	:	an elevated geological formation (noun.object)