The Collaborative International Dictionary of English v.0.48:

Unfearful \Unfearful\
   See fearful.

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "unfearful":
   audacious, aweless, bold, confident, courageous, dauntless,
   dreadless, fearless, intrepid, unafraid, unapprehensive, unbashful,
   undaunted, undiffident, unfearing, unfrightened, unscared, unshy,
   unterrified, untimid, untimorous, valiant, valorous