The Collaborative International Dictionary of English v.0.48:

Savagery \Sav"age*ry\ (?; 277), n. [F. sauvagerie.]
   1. The state of being savage; savageness; savagism.
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            A like work of primeval savagery.     --C. Kingsley.
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   2. An act of cruelty; barbarity.
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            The wildest savagery, the vilest stroke,
            That ever wall-eyed wrath or staring rage
            Presented to the tears of soft remorse. --Shak.
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   3. Wild growth, as of plants. --Shak.
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WordNet (r) 3.0 (2006):

savagery
    n 1: the property of being untamed and ferocious; "the coastline
         is littered with testaments to the savageness of the
         waters"; "a craving for barbaric splendor, for savagery and
         color and the throb of drums" [syn: savageness,
         savagery]
    2: the trait of extreme cruelty [syn: ferociousness,
       brutality, viciousness, savagery]
    3: a brutal barbarous savage act [syn: brutality, barbarity,
       barbarism, savagery]