| Solution | Length | |
|---|---|---|
| 4 letters | ||
| tabu | 4 | |
| 5 letters | ||
| taboo | 5 | |
| 6 letters | ||
| vetoed | 6 | |
| purged | 6 | |
| barred | 6 | |
| forbad | 6 | |
| banned | 6 | |
| 7 letters | ||
| forbade | 7 | |
| illegal | 7 | |
| illicit | 7 | |
| 8 letters | ||
| unlawful | 8 | |
| verboten | 8 | |
| debarred | 8 | |
| censored | 8 | |
| shut out | 8 | |
| 9 letters | ||
| unallowed | 9 | |
| forbidden | 9 | |
| 10 letters | ||
| ridiculous | 10 | |
| UNLICENSED | 10 | |
| 11 letters | ||
| OUTOFBOUNDS | 11 | |
| UNTOUCHABLE | 11 | |
| unthinkable | 11 | |
| 12 letters | ||
| preposterous | 12 | |
| unauthorized | 12 | |
| unsanctioned | 12 | |
| unimaginable | 12 | |
| 18 letters | ||
| self-contradictory | 18 | |