The Collaborative International Dictionary of English v.0.48:

Counterfeiter \Coun"ter*feit`er\ (-f?t`?r), n.
   1. One who counterfeits; one who copies or imitates;
      especially, one who copies or forges bank notes or coin; a
      forger.
      [1913 Webster]

            The coin which was corrupted by counterfeiters.
                                                  --Camden.
      [1913 Webster]

   2. One who assumes a false appearance or semblance; one who
      makes false pretenses.
      [1913 Webster]

            Counterfeiters of devotion.           --Sherwood.
      [1913 Webster]

WordNet (r) 3.0 (2006):

counterfeiter
    n 1: someone who makes copies illegally [syn: forger,
         counterfeiter]