WordNet (r) 3.0 (2006):

wholehearted
    adj 1: with unconditional and enthusiastic devotion; "heart-
           whole friendship"; "gave wholehearted support to her
           candidacy"; "wholehearted commitment"; "demonstrated his
           whole-souled allegiance" [syn: heart-whole,
           wholehearted, whole-souled]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "wholehearted":
   abiding, ardent, authentic, bona fide, bound, bound and determined,
   committed, decided, decisive, dedicated, definite, determined,
   devoted, earnest, enduring, fervent, genuine, heartfelt, hearty,
   impassioned, never-failing, obstinate, passionate, persevering,
   persistent, purposeful, relentless, resolute, resolved, serious,
   sincere, single-minded, steadfast, steady, tenacious, unfaltering,
   unfeigned, unqualified, unquestioning, unwavering