Source : Webster's Revised Unabridged Dictionary (1913)

Savageness \Sav"age*ness\, n.
   The state or quality of being savage.

         Wolves and bears, they say, Casting their savageness
         aside have done Like offices of pity.    --Shak.

Source : WordNet®

savageness
     n : the trait of extreme cruelty [syn: {ferociousness}, {brutality},
          {viciousness}, {savagery}]