The Collaborative International Dictionary of English v.0.48:

Excessive \Ex*cess"ive\ ([e^]k*s[e^]s"[i^]v), a. [Cf. F.
   excessif.]
   Characterized by, or exhibiting, excess; overmuch.
   [1913 Webster]

         Excessive grief [is] the enemy to the living. --Shak.

   Syn: Undue; exorbitant; extreme; overmuch; enormous;
        immoderate; monstrous; intemperate; unreasonable. See
        Enormous --Ex*cess*ive*ly, adv. -Ex*cess"ive*ness,
        n.
        [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "excessively":
   abominably, agonizingly, awfully, baldly, balefully,
   beyond all bounds, bitterly, blatantly, brashly, confoundedly,
   cruelly, damnably, deadly, deathly, deucedly, distressingly,
   dolorously, dreadfully, egregiously, ever, excruciatingly,
   exorbitantly, extortionately, extravagantly, extremely, flagrantly,
   frightfully, gougingly, grievously, grossly, hellishly, high,
   horribly, immensely, immoderately, improperly, inexcusably,
   infernally, inordinately, intemperately, intolerably, lamentably,
   miserably, nakedly, openly, outrageously, over, overfull, overly,
   overmuch, overweeningly, painfully, piteously, preposterously,
   prodigally, sadly, shatteringly, shockingly, something awful,
   something fierce, sorely, staggeringly, terribly, to excess,
   to extremes, too, too much, too-too, torturously, unashamedly,
   unbearably, unconscionably, unduly, unpardonably, unreasonably,
   usuriously, without restraint, woefully