The Collaborative International Dictionary of English v.0.48:

Rightward \Right"ward\, adv.
   Toward the right.
   [1913 Webster]

         Rightward and leftward rise the rocks.   --Southey.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "rightward":
   anticlockwise, astarboard, clockwise, counterclockwise, dexter,
   dextrad, dextrally, earthward, heavenward, homeward, landward,
   leeward, leftward, on the right, right, rightwardly, rightwards,
   seaward, starboard, to the right, widdershins, windward