The Collaborative International Dictionary of English v.0.48:

Earthenware \Earth"en*ware`\, n.
   Vessels and other utensils, ornaments, or the like, made of
   baked clay. See Crockery, Pottery, Stoneware, and
   Porcelain.
   [1913 Webster]

WordNet (r) 3.0 (2006):

earthenware
    n 1: ceramic ware made of porous clay fired at low heat

Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "earthenware":
   Kinkozan ware, Leeds pottery, Limoges, Meissen ware,
   Nabeshima ware, Satsuma ware, Seto ware, appliances, basalt,
   brassware, china, chinaware, clayware, copperware, crackle, delft,
   dinnerware, durable goods, durables, enamel, enamelware, faience,
   fixtures, flatware, glassware, graniteware, hard goods, hardware,
   hollow ware, housefurnishings, housewares, ironmongery, ironstone,
   ironware, jasper, jasper ware, kitchenware, luster pottery,
   majolica, metalware, ovenware, porcelain, silverware, spongeware,
   sporting goods, stoneware, tableware, terra cotta, tinware,
   tools and machinery, white goods, white pottery, woodenware