substantiality substantialist • substantialize · · · Info · Definitions · Synonyms · Antonyms · Characters · · substantiality · · Text Latin · · Script 14 · · Length Definitions · · · (noun) the quality of being substantial or having substance. Synonyms: substantialness, solidness. · · Noun Definition 1 Synonyms · · · substantialness · · Synonym 1 solidness · · Synonym 2 Antonyms · · · insubstantiality · · Antonym 0 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079