WordNet (r) 3.0 (2006):

metalworks
    n 1: factory where metal castings are produced [syn: foundry,
         metalworks]

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "metalworks":
   blacksmith shop, bleachworks, bloomery, bottling works, brassworks,
   copperworks, dye works, forge, foundry, furnace, gasworks,
   glassworks, ironworks, paper works, printworks, saltworks,
   scrapworks, smelter, smithery, smithy, soapworks, starchworks,
   steel mill, steelworks, stithy, tileworks, tryworks, tubeworks,
   waterworks, wireworks, works