Search Result for "tundra": 
Wordnet 3.0

NOUN (1)

1. a vast treeless plain in the Arctic regions where the subsoil is permanently frozen;

The Collaborative International Dictionary of English v.0.48:

Tundra \Tun"dra\ (t[=oo]n"dr[.a]), n. [Russ.] One of the level or undulating treeless plains characteristic of northern arctic regions in both hemispheres; the term is most commony associated with the arctic plains of Siberia. The tundras mark the limit of arborescent vegetation; they consist of black mucky soil with a permanently frozen subsoil, but support a dense growth of mosses and lichens, and dwarf herbs and shrubs, often showy-flowered. [Webster 1913 Suppl.]
WordNet (r) 3.0 (2006):

tundra n 1: a vast treeless plain in the Arctic regions where the subsoil is permanently frozen
Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "tundra": Alaska, Antarctic Zone, Antarctica, Arctic Circle, Arctic Zone, Frigid Zones, Greenland, Iceland, Lower Slobbovia, North Pole, Novaya Zemlya, Siberia, South Pole, Tierra del Fuego, alkali flat, alluvial plain, basin, bottomland, bushveld, campo, champaign, champaign country, coastal plain, delta, desert, down, downs, fell, flat, flat country, flatland, flats, grass veld, grassland, heath, lande, level, llano, lowland, lowlands, lunar mare, mare, mesa, mesilla, moor, moorland, open country, pampa, pampas, peneplain, plain, plains, plateau, playa, prairie, salt flat, salt marsh, salt pan, savanna, sebkha, steppe, table, tableland, the Antarctic, the Arctic, the Hebrides, the Yukon, tree veld, upland, vega, veld, weald, wide-open spaces, wold