The Collaborative International Dictionary of English v.0.48:

Flagrantly \Fla"grant*ly\, adv.
   In a flagrant manner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

flagrantly
    adv 1: in a flagrant manner; "he is flagrantly disregarding the
           law"

Moby Thesaurus II by Grady Ward, 1.0:

125 Moby Thesaurus words for "flagrantly":
   abjectly, abominably, agonizingly, arrantly, atrociously, awfully,
   baldly, balefully, basely, bestially, bitterly, blatantly, boldly,
   brashly, brazenfacedly, brazenly, brutally, colorfully,
   confoundedly, conspicuously, contemptibly, cruelly, damnably,
   deadly, deathly, despicably, detestably, deucedly, disgustingly,
   distressingly, dolorously, dreadful, dreadfully, egregiously,
   evilly, excessively, excruciatingly, execrably, exorbitantly,
   extravagantly, flagitiously, flaringly, foully, frightfully,
   fulsomely, garishly, gaudily, glaringly, gorgeously, grievously,
   grossly, heinously, hellishly, horribly, horridly, improperly,
   inexcusably, infamously, infernally, iniquitously, inordinately,
   intolerably, lamentably, loathsomely, luridly, markedly, meanly,
   miserably, monstrously, nakedly, nastily, nauseatingly,
   nefariously, notably, noticeably, notoriously, obnoxiously,
   obtrusively, odiously, offensively, openly, ostensibly,
   outrageously, outstandingly, painfully, peccantly, pettily,
   piteously, poorly, prominently, pronouncedly, rankly, sadly,
   saliently, savagely, scandalously, scurvily, sensationally,
   shabbily, shamefully, shamelessly, shatteringly, shockingly,
   shoddily, sinfully, something awful, something fierce, sordidly,
   sorely, staggeringly, staringly, strikingly, tawdrily, terribly,
   torturously, unashamedly, unbearably, unconscionably, unduly,
   unpardonably, viciously, vilely, wickedly, woefully, wretchedly