WordNet (r) 3.0 (2006):

walkway
    n 1: a path set aside for walking; "after the blizzard he
         shoveled the front walk" [syn: walk, walkway, paseo]

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "walkway":
   alameda, beaten path, beaten track, berm, bicycle path, boardwalk,
   bridle path, catwalk, esplanade, fastwalk, foot pavement, footpath,
   footway, garden path, groove, hiking trail, mall, parade, path,
   pathway, prado, promenade, public walk, run, runway, rut, sidewalk,
   towing path, towpath, track, trail, trottoir, walk