Source : Webster's Revised Unabridged Dictionary (1913)

Footboard \Foot"board`\, n.
   1. A board or narrow platfrom upon which one may stand or
      brace his feet; as:
      (a) The platform for the engineer and fireman of a
          locomotive.
      (b) The foot-rest of a coachman's box.

   2. A board forming the foot of a bedstead.

   3. A treadle.

Source : WordNet®

footboard
     n 1: a narrow platform on which to stand or brace the feet
     2: a vertical board or panel forming the foot of a bedstead