noxiousness noxiously • noy · · · Info · Definitions · Synonyms · Characters · · noxiousness · · Text Latin · · Script 11 · · Length 4 · · Syllables Definitions · · · (noun) the quality of being noxious. Synonyms: harmfulness, noisomeness. · · Noun Definition 1 Synonyms · · · harmfulness · · Synonym 1 noisomeness · · Synonym 2 Characters · · 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 x latin small letter x U+0078