frightfully

from WordNet (r) 3.0 (2006)

frightfully
    adv 1: used as intensifiers; "terribly interesting"; "I'm awful
           sorry" [syn: {terribly}, {awfully}, {awful},
           {frightfully}]

from The Collaborative International Dictionary of English v.0.48

Frightfully \Fright"ful*ly\, adv.
   In a frightful manner; to a frightful dagree.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

78 Moby Thesaurus words for "frightfully":
      abominably, agonizingly, alarmingly, amazingly, appallingly,
      astoundingly, awfully, baldly, balefully, bitterly, blatantly,
      brashly, confoundedly, cruelly, damnably, deadly, deathly,
      deucedly, disconcertingly, dismayingly, distressingly, dolorously,
      dreadfully, egregiously, excessively, excruciatingly, exorbitantly,
      extravagantly, extremely, fearfully, flagrantly, forbiddingly,
      ghastly, grievously, gruesomely, hellishly, hideously,
      horrendously, horribly, horridly, horrifically, horrifyingly,
      improperly, inexcusably, infernally, inordinately, intolerably,
      lamentably, loathsomely, miserably, nakedly, offensively, openly,
      painfully, piteously, repugnantly, repulsively, revoltingly, sadly,
      shatteringly, shockingly, something awful, something fierce,
      sorely, staggeringly, startlingly, surprisingly, terribly,
      terrifically, torturously, tremendously, unashamedly, unbearably,
      unconscionably, unduly, unpardonably, very, woefully