WordNet (r) 3.0 (2006):

reinforced
    adj 1: given added strength or support; "reinforced concrete
           contains steel bars or metal netting" [syn: reinforced,
           strengthened]
    2: (used of soaps or cleaning agents) having a substance (an
       abrasive or filler) added to increase effectiveness; "the
       built liquid detergents" [syn: built, reinforced]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "reinforced":
   accelerated, aggrandized, amplified, augmented, backed, beefed-up,
   bloated, boosted, broadened, calcified, callous, calloused,
   case-hardened, crusted, crusty, crystallized, deepened, elevated,
   enhanced, enlarged, expanded, extended, fossilized, granulated,
   hardened, heightened, hiked, hornified, increased, incrusted,
   indurate, indurated, inflated, intensified, jazzed up, lapidified,
   magnified, multiplied, ossified, petrified, proliferated, raised,
   rigidified, sclerotic, set, solidified, spread, steeled, stiffened,
   strengthened, swollen, tightened, toughened, vitrified, widened