The Collaborative International Dictionary of English v.0.48:

Grafter \Graft"er\, n.
   1. One who inserts scions on other stocks, or propagates
      fruit by ingrafting.
      [1913 Webster]

   2. An instrument by which grafting is facilitated.
      [1913 Webster]

   3. The original tree from which a scion has been taken for
      grafting upon another tree. --Shak.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "grafter":
   body snatcher, boodler, booster, chicken thief, con man, crook,
   crooked politician, den of thieves, embezzler, filcher, ganef,
   ghoul, grave robber, influence peddler, jackleg politician,
   jewel thief, land pirate, land shark, land-grabber, larcener,
   larcenist, lifter, peculator, petty thief, pilferer, poacher,
   prowler, purloiner, robber, scrounger, shoplifter, sneak thief,
   spoilsman, spoilsmonger, stealer, swindler, thief,
   white-collar thief