WordNet (r) 3.0 (2006):

implementation
    n 1: the act of accomplishing some aim or executing some order;
         "the agency was created for the implementation of the
         policy" [syn: execution, implementation, carrying
         out]
    2: the act of implementing (providing a practical means for
       accomplishing something); carrying into effect [syn:
       implementation, effectuation]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "implementation":
   accomplished fact, accomplishment, achievement, administration,
   attainment, carrying out, commission, completion, conduct,
   consummation, discharge, dispatch, effectuation, enactment,
   execution, fait accompli, fruition, fulfillment, handling,
   management, mission accomplished, performance, perpetration,
   production, realization, success, transaction