The Collaborative International Dictionary of English v.0.48:

Enrage \En*rage"\, v. t. [imp. & p. p. Enraged; p. pr. & vb.
   n. Enraging.] [F. enrager to be enraged; pref. en- (L. in)
   + rage rage. See Rage.]
   To fill with rage; to provoke to frenzy or madness; to make
   furious.

   Syn: To irritate; incense; inflame; exasperate; provoke;
        anger; madden; infuriate.
        [1913 Webster]

WordNet (r) 3.0 (2006):

enrage
    v 1: put into a rage; make violently angry