The Collaborative International Dictionary of English v.0.48:

Knavery \Knav"er*y\, n.; pl. Knaveries.
   1. The practices of a knave; petty villainy; fraud; trickery;
      a knavish action.
      [1913 Webster]

            This is flat knavery, to take upon you another man's
            name.                                 --Shak.
      [1913 Webster]

   2. pl. Roguish or mischievous tricks. --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

knavery
    n 1: lack of honesty; acts of lying or cheating or stealing
         [syn: dishonesty, knavery]

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "knavery":
   abomination, art, artful dodge, artifice, atrocity, bad, baseness,
   blind, chicanery, conspiracy, contrivance, coup, craft, cute trick,
   deceit, degradation, design, device, disgrace, dodge, error, evil,
   expedient, fakement, feint, fetch, gambit, game, gimmick, grift,
   infamy, iniquity, intrigue, jugglery, knavishness, little game,
   maneuver, moral turpitude, move, obliquity, peccancy, plot, ploy,
   racket, rascality, rascalry, red herring, reprobacy, roguery,
   roguishness, ruse, scampishness, scandal, scheme, scoundrelism,
   shame, shift, sin, sleight, stratagem, strategy, subterfuge,
   tactic, trick, trickery, turpitude, vileness, villainousness,
   villainy, wile, wily device, wrong