Found 2 items, similar to ferociousness.
English → English (WordNet) Definition: ferociousness ferociousness n : the trait of extreme cruelty [syn: brutality, viciousness, savageness, savagery]
English → English (gcide) Definition: ferociousness ferociousness \ferociousness\ n. the trait of extreme cruelty. Syn: brutality, viciousness, savageness, savagery. [WordNet 1.5] It [Christianity] has adapted the ferociousness of war. --Blair. [1913 Webster]