WordNet (r) 3.0 (2006):

stone wall
    n 1: a fence built of rough stones; used to separate fields

Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "stone wall":
   arch dam, backstop, balustrade, bamboo curtain, bank, bar, barrage,
   barrier, bear-trap dam, beaver dam, boom, boundary, breakwater,
   breastwork, brick wall, buffer, bulkhead, bulwark, cofferdam, dam,
   defense, dike, ditch, earthwork, embankment, fence, gate,
   gravity dam, groin, hydraulic-fill dam, iron curtain, jam, jetty,
   leaping weir, levee, logjam, milldam, moat, mole, mound, parapet,
   portcullis, rail, railing, rampart, roadblock, rock-fill dam,
   seawall, shutter dam, wall, weir, wicket dam, work