The Collaborative International Dictionary of English v.0.48:

Reward \Re*ward"\, n. [See Reward, v., and cf. Regard, n.]
   1. Regard; respect; consideration. [Obs.]
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            Take reward of thine own value.       --Chaucer.
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   2. That which is given in return for good or evil done or
      received; esp., that which is offered or given in return
      for some service or attainment, as for excellence in
      studies, for the return of something lost, etc.;
      recompense; requital.
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            Thou returnest
            From flight, seditious angel, to receive
            Thy merited reward.                   --Milton.
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            Rewards and punishments do always presuppose
            something willingly done well or ill. --Hooker.
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   3. Hence, the fruit of one's labor or works.
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            The dead know not anything, neither have they any
            more a reward.                        --Eccl. ix. 5.
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   4. (Law) Compensation or remuneration for services; a sum of
      money paid or taken for doing, or forbearing to do, some
      act. --Burrill.
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   Syn: Recompense; compensation; remuneration; pay; requital;
        retribution; punishment.
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The Collaborative International Dictionary of English v.0.48:

Reward \Re*ward"\, v. t. [imp. & p. p. Rewarded; p. pr. & vb.
   n. Rewarding.] [OF. rewarder, another form of regarder, of
   German origin. The original sense is, to look at, regard,
   hence, to regard as worthy, give a reward to. See Ward,
   Regard.]
   To give in return, whether good or evil; -- commonly in a
   good sense; to requite; to recompense; to repay; to
   compensate.
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         After the deed that is done, one doom shall reward,
         Mercy or no mercy as truth will accord.  --Piers
                                                  Plowman.
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         Thou hast rewarded me good, whereas I have rewarded
         thee evil.                               --1 Sam. xxiv.
                                                  17.
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         I will render vengeance to mine enemies, and will
         reward them that hate me.                --Deut. xxxii.
                                                  41.
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         God rewards those that have made use of the single
         talent.                                  --Hammond.
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WordNet (r) 3.0 (2006):

reward
    n 1: a recompense for worthy acts or retribution for wrongdoing;
         "the wages of sin is death"; "virtue is its own reward"
         [syn: wages, reward, payoff]
    2: payment made in return for a service rendered
    3: an act performed to strengthen approved behavior [syn:
       reward, reinforcement]
    4: the offer of money for helping to find a criminal or for
       returning lost property
    5: benefit resulting from some event or action; "it turned out
       to my advantage"; "reaping the rewards of generosity" [syn:
       advantage, reward] [ant: penalty]
    v 1: bestow honor or rewards upon; "Today we honor our
         soldiers"; "The scout was rewarded for courageous action"
         [syn: honor, honour, reward] [ant: attaint,
         disgrace, dishonor, dishonour, shame]
    2: strengthen and support with rewards; "Let's reinforce good
       behavior" [syn: reinforce, reward]
    3: act or give recompense in recognition of someone's behavior
       or actions [syn: reward, repay, pay back]

Moby Thesaurus II by Grady Ward, 1.0:

153 Moby Thesaurus words for "reward":
   Academy Award, Nobel Prize, Oscar, amends, annihilation, atonement,
   award, bait, bane, biological death, blood money, booby prize,
   bribe, carrot, cessation of life, clinical death, comeuppance,
   compensate, compensation, consideration, consolation prize,
   crossing the bar, curtains, damages, death, death knell,
   debt of nature, decease, demise, departure, desert, deserts,
   dissolution, dividend, doom, dying, ebb of life, encouragement,
   end, end of life, ending, eternal rest, exit, expiration,
   extinction, extinguishment, favor, fee, fillip, final summons,
   finger of death, first prize, get satisfaction, going, going off,
   grave, guerdon, hand of death, honor, honorarium, incentive,
   incitement, indemnification, indemnify, indemnity, inducement,
   interest, invitation, jackpot, jaws of death, just deserts, knell,
   last debt, last muster, last rest, last roundup, last sleep,
   leaving life, loss of life, lure, make amends, make requital,
   make restitution, make retribution, making an end, meed, parting,
   passing, passing away, passing over, pay, pay back,
   pay by installments, pay off, pay on, payment, percentage,
   perishing, persuasive, plum, premium, prepay, price, prize, profit,
   provocation, punishment, quietus, quit, quittance, recompense,
   redress, release, remit, remunerate, remuneration, render,
   reparation, repay, reprisal, requital, requite, requitement, rest,
   restitution, retribution, return, revenge, salary, salvage,
   satisfaction, satisfy, second prize, sentence of death,
   shades of death, shadow of death, sleep, smart money, solatium,
   somatic death, stimulation, stimulative, stimulus,
   summons of death, sweepstakes, sweetener, sweetening, tender,
   tribute, wergild, what is due, what is merited, whet