ski

ski
    n 1: narrow wood or metal or plastic runners used in pairs for
         gliding over snow
    v 1: move along on skis; "We love to ski the Rockies"; "My
         children don't ski"
    

Ski \Ski\ (sk[=e]), n.; pl. {skis} (sk[=e]z). [Dan. ski; Icel.
   sk[imac][eth] a billet of wood. See {Skid}.]
   A long, flat, narrow runner made of wood, plastic or metal,
   curved upwards in front, having a fitting allowing it to be
   attached to the foot, and used for gliding or sliding over
   snow. Commonly used in the plural, to designate the pair.
   [Also spelled {skee}.]
   [Webster 1913 Suppl. +PJC] Skiagraph
    

Skee \Skee\, n. [Dan. ski; Icel. sk[imac]? a billet of wood. See
   {Skid}.]
   A long strip of wood, curved upwards in front, used on the
   foot for sliding; now usually spelled {ski}.
   [1913 Webster]
    

25 Moby Thesaurus words for "ski":
      coast, flit, flow, fly, glide, glissade, ice skates, ice-skate,
      roller skates, roller-skate, sail, sideslip, skate, skateboard,
      skates, skid, skim, sled, sleigh, slide, slip, slither, snowshoes,
      sweep, toboggan