Found 2 items, similar to furiousness.
English → English (WordNet) Definition: furiousness furiousness n : the property of being wild or turbulent; “the storm's violence” [syn: ferocity, fierceness, fury, vehemence, violence, wildness]
English → English (gcide) Definition: furiousness furiousness \fu"ri*ous*ness\ n. The quality of being furious. Syn: ferocity, fierceness, fury, vehemence, violence, wildness, strength. [WordNet 1.5]