SYN
alkali flat, alluvial plain, basin, baygall, bog, bottom, bottoms, buffalo wallow, bushveld, campo, champaign, champaign country, coastal plain, delta, desert, down, downs, everglade, fell, fen, fenland, flat, flat country, flatland, flats, glade, grassland, grass veld, heath, hog wallow, holm, lande, level, llano, lowland, lowlands, lunar mare, marais, mare, marish, marsh, marshland, meadow, mere, mesa, mesilla, mire, moor, moorland, morass, moss, mud, mud flat, open country, pampa, pampas, peat bog, peneplain, plain, plains, plateau, playa, prairie, quagmire, quicksand, salt flat, salt marsh, salt pan, savanna, sebkha, slob land, slough, sough, steppe, sump, swale, swamp, swampland, table, tableland, taiga, tree veld, tundra, upland, vega, veld, wallow, wash, weald, wide-open spaces, wold,