The Collaborative International Dictionary of English v.0.48:

Workbench \Work"bench`\, n.
   A bench on which work is performed, as in a carpenter's shop.
   [1913 Webster]

WordNet (r) 3.0 (2006):

workbench
    n 1: a strong worktable for a carpenter or mechanic [syn:
         workbench, work bench, bench]

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "workbench":
   agency, ambo, atelier, bar, barbershop, beauty parlor, beauty shop,
   bench, board, buffet, butcher shop, company, concern, corporation,
   counter, desk, escritoire, establishment, facility, firm, house,
   installation, institution, lectern, loft, organization, parlor,
   secretaire, secretary, shop, stand, studio, sweatshop, table,
   work site, work space, workhouse, working space, workplace,
   workroom, workshop, worktable, writing table