The Collaborative International Dictionary of English v.0.48:

Requite \Re"quite"\ (r?-kw?t"), v. t. [imp. & p. p. Requited;
   p. pr. & vb. n. Requiting.] [Pref. re- + quit.]
   To repay; in a good sense, to recompense; to return (an
   equivalent) in good; to reward; in a bad sense, to retaliate;
   to return (evil) for evil; to punish.
   [1913 Webster]

         He can requite thee; for he knows the charma
         That call fame on such gentle acts as these. --Milton.
   [1913 Webster]

         Thou hast seen it; for thou beholdest mischief and
         spite, to requite it with thy hand.      --Ps. x. 14.
   [1913 Webster]

   Syn: To repay; reward; pay; compensate; remunerate; satisfy;
        recompense; punish; revenge.
        [1913 Webster]

WordNet (r) 3.0 (2006):

requite
    v 1: make repayment for or return something [syn: requite,
         repay]

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "requite":
   alternate, amend, atone, avenge, bandy, be quits with, change,
   commute, compensate, compensate for, content, cooperate, correct,
   counterchange, emend, exchange, get back at, get even with,
   get satisfaction, give and take, give satisfaction, indemnify,
   interchange, kick back, logroll, make all square, make amends,
   make good, make reparation, make requital, make restitution,
   make retribution, make right, make up for, make up to, pay,
   pay back, pay damages, pay in kind, pay off, pay reparations,
   permute, put right, put straight, put to rights, quit, reciprocate,
   recompense, recoup, rectify, redress, refund, reimburse, remedy,
   remunerate, repay, respond, respond to, retaliate, return,
   return the compliment, revenge, reward, right, satisfy, set right,
   set straight, set to rights, set up, square, swap, switch, trade,
   transpose