The Collaborative International Dictionary of English v.0.48:

Daring \Dar"ing\, a.
   Bold; fearless; adventurous; as, daring spirits. --
   Dar"ing*ly, adv. -- Dar"ing*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

daringly
    adv 1: in an original manner; "daringly he took the first step"
    2: in an adventurous manner; "daringly, he set out on a camping
       trip in East Africa"

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "daringly":
   audaciously, boldly, bravely, bulldoggishly, chivalrously,
   courageously, dashingly, doughtily, fearlessly, flashily,
   flauntingly, foolhardily, gaily, gallantly, gamely, glitteringly,
   gutsily, hardily, harebrainedly, heroically, intrepidly, jauntily,
   knightly, like a man, like a soldier, pertinaciously, pluckily,
   presumptuously, resolutely, showily, spunkily, stalwartly, stoutly,
   tenaciously, unfearfully, unfearingly, valiantly, valorously,
   with a flair, yeomanly