substitutability substituent • substitutable · · · Info · Definitions · Synonyms · Characters · · substitutability · · Text Latin · · Script 16 · · Length 7 · · Syllables Definitions · · · (noun) exchangeability by virtue of being replaceable. Synonyms: replaceability, commutability. · · Noun Definition 1 Synonyms · · · replaceability · · Synonym 1 commutability · · Synonym 2 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 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