| Solution | Length | |
|---|---|---|
| 3 letters | ||
| dim | 3 | |
| 4 letters | ||
| rare | 4 | |
| 6 letters | ||
| secret | 6 | |
| unique | 6 | |
| untold | 6 | |
| 7 letters | ||
| strange | 7 | |
| 8 letters | ||
| puzzling | 8 | |
| wondrous | 8 | |
| TERMLESS | 8 | |
| striking | 8 | |
| esoteric | 8 | |
| rambling | 8 | |
| profound | 8 | |
| 9 letters | ||
| unlimited | 9 | |
| universal | 9 | |
| wonderful | 9 | |
| unplumbed | 9 | |
| unbounded | 9 | |
| RECONDITE | 9 | |
| 10 letters | ||
| unexpected | 10 | |
| MYSTERIOUS | 10 | |
| UNKNOWABLE | 10 | |
| unmeasured | 10 | |
| remarkable | 10 | |
| UNNUMBERED | 10 | |
| unheard-of | 10 | |
| stupendous | 10 | |
| PRODIGIOUS | 10 | |
| 11 letters | ||
| unconnected | 11 | |
| ENIGMATICAL | 11 | |
| unthinkable | 11 | |
| sensational | 11 | |
| 12 letters | ||
| unfathomable | 12 | |
| unbelievable | 12 | |
| unimaginable | 12 | |
| 13 letters | ||
| unprecedented | 13 | |
| unaccountable | 13 | |
| 14 letters | ||
| UNINTELLIGIBLE | 14 | |
| 15 letters | ||
| uncircumscribed | 15 | |