viscousness viscously • viscum · · · Info · Definitions · Synonyms · Characters · · viscousness · · Text Latin · · Script 11 · · Length 3 · · Syllables Definitions · · · (noun) resistance of a liquid to shear forces (and hence to flow). Synonyms: viscosity. · · Noun Definition 1 Synonyms · · · viscosity · · Synonym 1 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