escarpment

Noun
  1. A long steep slope or cliff at the edge of a plateau or ridge;
    Usually formed by erosion (synset 109297058)
    is a type of: incline, side, slope - an elevated geological formation
    same as: scarp
  2. A steep artificial slope in front of a fortification (synset 103301257)
    is a type of: fortification, munition - defensive structure consisting of walls or mounds built around a stronghold to strengthen it
    same as: escarp, protective embankment, scarp

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