The Collaborative International Dictionary of English v.0.48:

Wonderful \Won"der*ful\, a.
   Adapted to excite wonder or admiration; surprising; strange;
   astonishing.
   [1913 Webster]

   Syn: Marvelous; amazing. See Marvelous.
        [1913 Webster] -- Won"der*ful*ly, adv. --
        Won"der*ful*ness, n.
        [1913 Webster]

WordNet (r) 3.0 (2006):

wonderfully
    adv 1: (used as an intensifier) extremely well; "her voice is
           superbly disciplined"; "the colors changed wondrously
           slowly" [syn: wonderfully, wondrous, wondrously,
           superbly, toppingly, marvellously, terrifically,
           marvelously]

Moby Thesaurus II by Grady Ward, 1.0:

73 Moby Thesaurus words for "wonderfully":
   abundantly, acutely, amazingly, amply, astonishingly, awesomely,
   beguilingly, bewilderingly, conspicuously, copiously, divinely,
   eminently, emphatically, enigmatically, exceptionally, exquisitely,
   extraordinarily, exuberantly, fabulously, famously, fantastically,
   fascinatingly, generously, glaringly, gloriously, immensely,
   impressively, incomprehensibly, inconceivably, incredibly,
   ineffably, intensely, magically, magnanimously, magnificently,
   markedly, marvelously, miraculously, nobly, notably, outlandishly,
   particularly, peculiarly, phenomenally, pointedly, preeminently,
   prodigiously, profusely, prominently, pronouncedly, puzzlingly,
   remarkably, richly, sensationally, signally, singularly,
   splendidly, strangely, strikingly, stupendously, superbly,
   superlatively, surpassingly, surprisingly, terrifically,
   tremendously, uncommonly, unimaginably, unspeakably, unusually,
   wondrous, wondrously, worthily