authenticity authenticator • authenticly · · · Info · Definitions · Synonyms · Characters · · authenticity · · Text Latin · · Script 12 · · Length 6 · · Syllables Definitions · · · (noun) undisputed credibility. Synonyms: genuineness, legitimacy. · · Noun Definition 1 Synonyms · · · genuineness · · Synonym 1 legitimacy · · Synonym 2 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079