The Collaborative International Dictionary of English v.0.48:

Footstep \Foot"step`\, n.
   1. The mark or impression of the foot; a track; hence,
      visible sign of a course pursued; token; mark; as, the
      footsteps of divine wisdom.
      [1913 Webster]

            How on the faltering footsteps of decay
            Youth presses.                        --Bryant.
      [1913 Webster]

   2. An inclined plane under a hand printing press.
      [1913 Webster]

WordNet (r) 3.0 (2006):

footstep
    n 1: the sound of a step of someone walking; "he heard footsteps
         on the porch" [syn: footfall, footstep, step]
    2: the act of taking a step in walking
    3: the distance covered by a step; "he stepped off ten paces
       from the old tree and began to dig" [syn: footstep, pace,
       step, stride]

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "footstep":
   boss, bump, clop, colophon, concavity, convexity, dactylogram,
   dactylograph, dent, dint, doorstep, embossment, example,
   excrescence, fingerprint, footfall, footmark, footprint,
   footprints, footrest, footsteps, fossil footprint, hippety-hop,
   hoofbeat, hop, ichnite, ichnolite, impress, impression, imprint,
   indent, indentation, indention, jump, lump, pace, pad, paw print,
   pawmark, pimple, print, pug, pugmark, rest, riser, round, rundle,
   rung, scale, seal, sigil, signet, skip, spoke, spoor, stair, stamp,
   stave, step, step stool, stepping-stone, stride, string, stud,
   thumbmark, thumbprint, trace, track, tract, tradition, trail,
   tread, vestige, way of life