mountain
Elevated landform characterized by steep slopes; it is usually part of a chain.
valley 
Elongated depression shaped by a watercourse or glacier and bounded by the slopes of the surrounding land.
kettle 
Cavity formed as a mass of melting ice detaches from the tongue of a receding glacier; some kettles fill with water to form a lake.
drumlin 
Low hill sculpted by a moving glacier and formed of glacial drift; drumlins are usually found in parallel groupings.
lake 
Body of water completely surrounded by land; it varies in size and depth.
plateau 
Vast expanse of relatively flat land, higher than the surrounding region and bounded by deep valleys with sheer cliffs.
mountain torrent 
Watercourse flowing steeply with irregular flow; it is subject to violent floods when the snow melts.
crest 
Line intersecting two mountain slopes; a crest can run all the way into the valley.
perpetual snows 
Accumulations of snow on the highest reaches of a mountain that never melt.