The Collaborative International Dictionary of English v.0.48:

Revenge \Re*venge"\, v. t. [imp. & p. p. Revenged, p. pr. &
   vb. n. Revenging.] [OF. revengier, F. revancher; pref. re-
   re- + OF. vengier to avenge, revenge, F. venger, L.
   vindicare. See Vindicate, Vengerance, and cf.
   Revindicate.]
   1. To inflict harm in return for, as an injury, insult, etc.;
      to exact satisfaction for, under a sense of injury; to
      avenge; -- followed either by the wrong received, or by
      the person or thing wronged, as the object, or by the
      reciprocal pronoun as direct object, and a preposition
      before the wrong done or the wrongdoer.
      [1913 Webster]

            To revenge the death of our fathers.  --Ld. Berners.
      [1913 Webster]

            The gods are just, and will revenge our cause.
                                                  --Dryden.
      [1913 Webster]

            Come, Antony, and young Octavius, come,
            Revenge yourselves alone on Cassius.  --Shak.
      [1913 Webster]

   2. To inflict injury for, in a spiteful, wrong, or malignant
      spirit; to wreak vengeance for maliciously.
      [1913 Webster]

   Syn: To avenge; vindicate. See Avenge.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Revenge \Re*venge"\, v. i.
   To take vengeance; -- with upon. [Obs.] "A bird that will
   revenge upon you all." --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Revenge \Re*venge"\, n.
   1. The act of revenging; vengeance; retaliation; a returning
      of evil for evil.
      [1913 Webster]

            Certainly, in taking revenge, a man is even with his
            enemy; but in passing it over he is superior.
                                                  --Bacon.
      [1913 Webster]

   2. The disposition to revenge; a malignant wishing of evil to
      one who has done us an injury.
      [1913 Webster]

            Revenge now goes
            To lay a complot to betray thy foes.  --Shak.
      [1913 Webster]

            The indulgence of revenge tends to make men more
            savage and cruel.                     --Kames.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "revenge":
   amends, atonement, avenge, avengement, avenging, balancing,
   comeuppance, commutation, compensation, counteraction,
   counterbalancing, counterblow, defend, desert, deserts,
   even the score, expiation, get, get even with, indemnification,
   indemnity, just deserts, justify, launch a vendetta, lex talionis,
   offsetting, punish, punishment, quittance, recompense,
   rectification, redress, reparation, repayment, reprisal, requital,
   restitution, retaliate, retaliation, retribution, revanche, reward,
   satisfaction, spitefulness, substitution, take revenge, vengeance,
   vindicate, vindictiveness, what is due, what is merited