Synonyms of unofficial
- 2 Syllables
- bootleg, backdoor
- 3 Syllables
- personal, pirated, black-market, bootlegged, informal, outlawed, unfussy, illegal, private, throwaway, nonpublic
- 4 Syllables
- unapproved, extralegal, unsanctioned, unconfirmed, low-pressure, free-and-easy
- 5 Syllables
- unauthorized
- 6 Syllables
- uncorroborated