talus

bone

anklebone astragalus tarsus

bluff cliff dune highland hillside hilltop ridge slope

acclivity ascent butte climb down drift elevation eminence esker fell gradient headland heap height hillock hummock inclination incline knoll mesa mound mount precipice prominence promontory protuberance range rise shock stack summit tor upland

rising ground

bottom decline depression nadir

canyon ditch gully