viciousness viciously • vicissitous · · · Info · Definitions · Synonyms · Characters · · viciousness · · Text Latin · · Script 11 · · Length Definitions · · · (noun) the trait of extreme cruelty. Synonyms: ferociousness, brutality, savagery. · · Noun Definition 1 Synonyms · · · ferociousness · · Synonym 1 brutality · · Synonym 2 savagery · · Synonym 3 Characters · · c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 u latin small letter u U+0075 v latin small letter v U+0076