alkali flat, alluvial plain, bailiwick, basin, bottomland, bushveld, campo, champaign country, coastal plain, delta, demesne, desert, domain, dominion, 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, province, salt flat, salt marsh, salt pan, savanna, sebkha, sphere, steppe, table, tableland, terrain, territory, tree veld, tundra, upland, vega, veld, walk, weald, wide-open spaces, wold