WordNet (r) 3.0 (2006):

unflawed
    adj 1: without a flaw; "a flawless gemstone" [syn: flawless,
           unflawed]

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "unflawed":
   absolute, beyond all praise, chaste, defectless, faultless,
   flawless, ideal, immaculate, impeccable, indefectible, indefective,
   infallible, irreproachable, just right, peerless, perfect, pure,
   sinless, spotless, stainless, taintless, unadulterated,
   unblemished, uncontaminated, unfaultable, unmixed, unspotted,
   untainted