The Collaborative International Dictionary of English v.0.48:

Eagerly \Ea"ger*ly\, adv.
   In an eager manner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

eagerly
    adv 1: with eagerness; in an eager manner; "the news was eagerly
           awaited" [syn: eagerly, thirstily]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "eagerly":
   animatedly, anxiously, ardently, avidly, breathlessly,
   de bonne volonte, enthusiastically, impatiently, keenly, promptly,
   quickly, readily, vivaciously, willingly, with a will,
   with alacrity, with good will, with gusto, with open arms,
   with relish, with zest, zealously, zestfully