tor

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 talus upland

rising ground

bottom decline depression nadir

canyon ditch gully

alp bluff butte cliff crag elevation eminence height mesa mount palisade peak pike precipice range ridge sierra volcano

abundance drift glob heap hump mass mound pile stack ton

depression

crevasse valley

eminence height

bulge bump cliff conspicuousness crag crest elevation headland jutting mound pinnacle projection promontory protrusion protuberance rise spur swelling

conspicuity high point markedness

unimportance

bottom depression nadir

obscurity