Synonyms of unwritten

2 Syllables
phonic, phrasal, unsaid, tacit, spoken, lingual, vocal, verbal, oral
3 Syllables
word-for-word, word-of-mouth, phonated, lexical, accepted
4 Syllables
unrecorded, customary, conventional, traditional
5 Syllables
unformulated
6 Syllables
ejaculatory