[1] : The Collaborative International Dictionary of English v.0.48

unmatched \unmatched\
   see matched.
see also:
matched 

[2] : WordNet (r) 2.0

unmatched
     adj 1: of the remaining member of a pair, of socks e.g. syn: odd,
             unmated, unpaired
     2: eminent beyond or above comparison; "matchless beauty"; "the
        team's nonpareil center fielder"; "she's one girl in a
        million"; "the one and only muhammad ali"; "a peerless
        scholar"; "infamy unmatched in the western world"; "wrote
        with unmatchable clarity"; "unrivaled mastery of her art"
        syn: matchless, nonpareil, onea, one and onlya,
         peerless, unmatchable, unrivaled, unrivalled
see also:
odd unmated unpaired matchless nonpareil onea 
one and onlya peerless unmatchable unrivaled unrivalled 

[3] : Moby Thesaurus II by Grady Ward, 1.0

70 moby thesaurus words for "unmatched":
   best, beyond compare, beyond comparison, champion, choice,
   contrasting, counter, different, disparate, dissimilar, divergent,
   diverse, easily first, elect, elite, facile princeps, for the best,
   greatest, handpicked, hardly like, immortal, incomparable,
   inimitable, invincible, matchless, nonuniform, nulli secundus, odd,
   off, offbeat, only, optimal, optimum, out, paramount, peerless,
   picked, prime, prize, quintessential, scarcely like,
   second to none, select, sui generis, supreme, surpassing, unalike,
   unapproachable, unapproached, unbeatable, unequaled, unexampled,
   unexcelled, unidentical, unique, unlike, unmatchable, unpaired,
   unparagoned, unparalleled, unpeered, unresembling, unrivaled,
   unsame, unsimilar, unsurpassable, unsurpassed, very best,
   without equal, without parallel

Unmatched >> U Words
Unmatched, definition of term: Unmatched
unmatched_pag1.html