The Collaborative International Dictionary of English v.0.48:

Boldly \Bold"ly\, adv. [AS. bealdl[imac]ce.]
   In a bold manner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

boldly
    adv 1: with boldness, in a bold manner; "we must tackle these
           tasks boldly"

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "boldly":
   arrantly, audaciously, blatantly, boldfacedly, bravely,
   brazenfacedly, brazenly, bulldoggishly, chivalrously,
   conspicuously, courageously, daringly, doughtily, fearlessly,
   flagrantly, gallantly, gamely, glaringly, gutsily, hardily,
   heroically, intrepidly, knightly, like a man, like a soldier,
   markedly, notably, noticeably, notoriously, obtrusively,
   ostensibly, outstandingly, pertinaciously, pluckily, prominently,
   pronouncedly, resolutely, saliently, shamelessly, spunkily,
   stalwartly, staringly, stoutly, strikingly, tenaciously,
   unblushingly, unfearfully, unfearingly, valiantly, valorously,
   yeomanly