The Collaborative International Dictionary of English v.0.48:

Rawhide \Raw"hide`\ (r[add]"h[imac]d`), n.
   A cowhide, or coarse riding whip, made of untanned (or raw)
   hide twisted.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rawhide
    n 1: untanned hide especially of cattle; cut in strips it is
         used for whips and ropes

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "rawhide":
   Leatherette, Leatheroid, baste, bastinado, beat, belabor, belt,
   birch, blacksnake, buffet, bullwhack, bullwhip, cane, cat, club,
   coat, cowhide, crop, cudgel, cut, cuticle, dermis, drub, fell,
   flagellate, flagellum, flail, fleece, flesh, flog, fur, furring,
   fustigate, give a whipping, give the stick, hide, horsewhip,
   imitation fur, imitation leather, integument, jacket, knout,
   kurbash, lace, lash, lay on, leather, leather paper, outer layer,
   outer skin, pelt, peltry, pistol-whip, pommel, pummel, quirt,
   razor strap, rind, scourge, sheath, sjambok, skin, skins, smite,
   spank, strap, stripe, swinge, switch, tegument, thong, thrash,
   thump, trounce, truncheon, vair, wallop, whale, whip, whiplash,
   whop