The Collaborative International Dictionary of English v.0.48:

Patiently \Pa"tient*ly\, adv.
   In a patient manner. --Cowper.
   [1913 Webster] Patin

WordNet (r) 3.0 (2006):

patiently
    adv 1: with patience; in a patient manner; "he patiently played
           with the child" [ant: impatiently]

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "patiently":
   assiduously, devotedly, diligently, doggedly, enduringly,
   faithfully, forbearantly, forbearingly, indefatigably, indulgently,
   industriously, insistently, leniently, loyally, perseveringly,
   persistently, persistingly, pertinaciously, philosophically,
   ploddingly, relentlessly, resolutely, sedulously, sloggingly,
   stoically, tenaciously, tirelessly, tolerantly, unabatingly,
   unfalteringly, unflaggingly, unflinchingly, unintermittingly,
   uninterruptedly, unrelentingly, unremittingly, unrestingly,
   unsleepingly, unswervingly, untiringly, unwaveringly, unwearyingly,
   wearilessly