WordNet (r) 3.0 (2006):

dust bowl
    n 1: a region subject to dust storms; especially the central
         region of United States subject to dust storms in the 1930s

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "dust bowl":
   Arabia Deserta, Death Valley, Sahara, agricultural region,
   arable land, barren, barren land, barrens, black belt, brush, bush,
   citrus belt, corn belt, cotton belt, countryside, desert,
   desolation, farm belt, farm country, farmland, fruit belt,
   grass roots, grassland, grazing region, heath, highlands,
   howling wilderness, karroo, lowlands, lunar landscape, lunar waste,
   meadows and pastures, moors, outback, plains, prairies, province,
   provinces, rural district, rustic region, salt flat, steppes,
   the country, the soil, the sticks, tobacco belt, uplands, veld,
   waste, wasteland, weary waste, wheat belt, wide-open spaces, wild,
   wilderness, wilds, woodland, woods and fields, yokeldom