Source : Webster's Revised Unabridged Dictionary (1913)

Equalization \E`qual*i*za"tion\, n.
   The act of equalizing, or state of being equalized.

         Their equalization with the rest of their fellow
         subjects.                                --Burke.

Source : WordNet®

equalization
     n : the act of making equal or uniform [syn: {equalisation}, {leveling}]