The Collaborative International Dictionary of English v.0.48:

Wall \Wall\, v. t. [imp. & p. p. Walled; p. pr. & vb. n.
   Walling.]
   1. To inclose with a wall, or as with a wall. "Seven walled
      towns of strength." --Shak.
      [1913 Webster]

            The king of Thebes, Amphion,
            That with his singing walled that city. --Chaucer.
      [1913 Webster]

   2. To defend by walls, or as if by walls; to fortify.
      [1913 Webster]

            The terror of his name that walls us in. --Denham.
      [1913 Webster]

   3. To close or fill with a wall, as a doorway.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "walled":
   armored, barred, beleaguered, beset, besieged, blockaded, bound,
   cabined, caged, cased, ceiled, cloaked, cloistered, closed-in,
   clouded, coated, confined, cooped, coped, cordoned, cordoned off,
   corralled, covered, covert, cowled, cramped, cribbed, curtained,
   eclipsed, encapsulated, encapsuled, encased, enclosed, enveloped,
   enwrapped, fenced, filmed, floored, hedged, hemmed, hooded, housed,
   immured, imprisoned, incarcerated, jailed, leaguered, loricate,
   loricated, mantled, masked, mewed, muffled, mural, obscured,
   occulted, packaged, paled, parietal, partitioned, paved, penned,
   pent-up, quarantined, railed, restrained, roofed-in, screened,
   scummed, septal, sheathed, shelled, shielded, shrouded, shut-in,
   swathed, tented, under cover, veiled, walled-in, wrapped