The Collaborative International Dictionary of English v.0.48:

Disparate \Dis"pa*rate\, a. [L. disparatus, p. p. of disparare
   to part, separate; dis- + parare to make ready, prepare.]
   1. Unequal; dissimilar; separate.
      [1913 Webster]

            Connecting disparate thoughts, purely by means of
            resemblances in the words expressing them.
                                                  --Coleridge.
      [1913 Webster]

   2. (Logic) Pertaining to two coordinate species or divisions.
      [1913 Webster]

WordNet (r) 3.0 (2006):

disparate
    adj 1: fundamentally different or distinct in quality or kind;
           "such disparate attractions as grand opera and game
           fishing"; "disparate ideas"
    2: including markedly dissimilar elements; "a disparate
       aggregate of creeds and songs and prayers"

Moby Thesaurus II by Grady Ward, 1.0:

82 Moby Thesaurus words for "disparate":
   assorted, asymmetric, at odds, at variance, contrary, contrasted,
   contrasting, counter, departing, deviating, deviative, different,
   differentiated, differing, disaccordant, disagreeing, discordant,
   discrepant, discrete, discriminated, disjoined, disproportionate,
   dissimilar, dissonant, distant, distinct, distinguished, divergent,
   diverging, divers, diverse, diversified, hardly like,
   heterogeneous, ill-matched, ill-sorted, in disagreement,
   inaccordant, inadequate, incompatible, incongruous, inconsistent,
   inconsonant, inharmonious, insufficient, irreconcilable, irregular,
   many, mismatched, motley, multifarious, nonuniform, odd, off,
   offbeat, out, out of proportion, poles apart, poles asunder,
   scarcely like, separate, separated, several, skew, skewed, unalike,
   unconformable, unequal, uneven, unidentical, unlike, unmatched,
   unresembling, unsame, unsimilar, variant, varied, variegated,
   various, varying, widely apart, worlds apart