Source : Webster's Revised Unabridged Dictionary (1913)

Homogeneousness \Ho`mo*ge"ne*ous*ness\, n.
   Sameness 9kind or nature; uniformity of structure or
   material.

Source : WordNet®

homogeneousness
     n : the quality of being similar or comparable in kind or
         nature; "there is a remarkable homogeneity between the
         two companies" [syn: {homogeneity}] [ant: {heterogeneity}]