[1] : WordNet (r) 2.0

salt flat
     n : a flat expanse of salt left by the evaporation of a body of
         salt water syn: salt plain
see also:
salt plain 

[2] : Moby Thesaurus II by Grady Ward, 1.0

77 moby thesaurus words for "salt flat":
   arabia deserta, death valley, sahara, alkali flat, alluvial plain,
   barren, barren land, barrens, basin, bottomland, brush, bush,
   bushveld, campo, champaign, champaign country, coastal plain,
   delta, desert, desolation, down, downs, dust bowl, fell, flat,
   flat country, flatland, flats, grass veld, grassland, heath,
   howling wilderness, karroo, lande, level, llano, lowland, lowlands,
   lunar landscape, lunar mare, lunar waste, mare, mesa, mesilla,
   moor, moorland, open country, outback, pampa, pampas, peneplain,
   plain, plains, plateau, playa, prairie, salt marsh, salt pan,
   savanna, sebkha, steppe, table, tableland, tree veld, tundra,
   upland, vega, veld, waste, wasteland, weald, weary waste,
   wide-open spaces, wild, wilderness, wilds, wold

[3] : U.S. Gazetteer (1990)

salt flat, tx
  zip codes: 79847

Flat >> F Words
Flat, definition of term: Flat
flat_pag1.html

Flat Top >> F Words
Flat Top, definition of term: Flat Top
flat+top_pag1.html

Flat Tire >> F Words
Flat Tire, definition of term: Flat Tire
flat+tire_pag1.html

Flat File >> F Words
Flat File, definition of term: Flat File
flat+file_pag1.html

Flat Out >> F Words
Flat Out, definition of term: Flat Out
flat+out_pag1.html

Ethereal Salt >> E Words
Ethereal Salt, definition of term: Ethereal Salt
ethereal+salt_pag1.html