treasonist treasonish • treasonless · · · Info · Definitions · Synonyms · Characters · · treasonist · · Text Latin · · Script 10 · · Length 3 · · Syllables Definitions · · · (noun) someone who betrays his country by committing treason. Synonyms: traitor. · · Noun Definition 1 Synonyms · · · traitor · · Synonym 1 Characters · · a latin small letter a U+0061 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 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074