serac, icefall, snowfield, seracs, crevice, glacier, rockface, ravine, couloir, gorge, climbers, cliff, canyon, nanga parbat, cave, mountainside, crag, mountaineers, lhotse, longs peak, corrie, ledge, nuptse, gasherbrum, mountain, tramper, precipices, rescuers, mount mckinley, elevator shaft, canyoneering, crampon, mountain climber, snowslide, rappel, scree, sastrugi, snowshoer, creek bed, icecap, helvellyn, fiord, massif, bivvy, crater, makalu, boulder, chasms, backcountry, hiker, cavern, floe, mineshaft, kangchenjunga, marmolada, carstensz, weddell sea, bernese alps, pitons, gully, expedition, blowhole, ben nevis, icefield, fjord, timberline, wrangell mountains, bunny slope, chilkoot pass, dhaulagiri, gulch, aconcagua, rock outcrop, slopes, volcanic crater, abysses, summiting, scafell pike, altitude sickness, hogback, himalayas, glissade, ridge, trekker, snowbank, avalanche, mcmurdo sound, sir edmund hillary, sherpas, moulin, abseil, alpine glacier, belaying, eiger, antarctic continent, waterfall, norgay, manhole, rapids, alps, ice floe, snowdrift, crevasses, chasm, gash, precipice, ravines, ditch, outcropping, crack, gashes, gullies, braided, deltaic, distributary, preglacial, relict, accustomed, aggraded, aggrading, alluvial, antenna, bursty, charted, conductive, constricted, deepwater, dredged, eroded, erodible, erosional, filamentary

cleft, crack, crevice, fissure, scissure