| Solution | Length | |
|---|---|---|
| 3 letters | ||
| odd | 3 | |
| 4 letters | ||
| anag | 4 | |
| hard | 4 | |
| rare | 4 | |
| 5 letters | ||
| poser | 5 | |
| queer | 5 | |
| tough | 5 | |
| 6 letters | ||
| enigma | 6 | |
| sealed | 6 | |
| knotty | 6 | |
| virgin | 6 | |
| unique | 6 | |
| mystic | 6 | |
| teaser | 6 | |
| 7 letters | ||
| unknown | 7 | |
| strange | 7 | |
| obscure | 7 | |
| 8 letters | ||
| wondrous | 8 | |
| striking | 8 | |
| profound | 8 | |
| 9 letters | ||
| enigmatic | 9 | |
| unbeknown | 9 | |
| untouched | 9 | |
| wonderful | 9 | |
| unplumbed | 9 | |
| UNEXPOSED | 9 | |
| uncharted | 9 | |
| upsetting | 9 | |
| 10 letters | ||
| UNKNOWABLE | 10 | |
| remarkable | 10 | |
| rubikscube | 10 | |
| PRODIGIOUS | 10 | |
| UNEXPLORED | 10 | |
| unfamiliar | 10 | |
| unfathomed | 10 | |
| stupendous | 10 | |
| unrevealed | 10 | |
| PERPLEXING | 10 | |
| unheard-of | 10 | |
| 11 letters | ||
| unexploited | 11 | |
| UNEXPLAINED | 11 | |
| problematic | 11 | |
| sensational | 11 | |
| UNDISCLOSED | 11 | |
| UNPERCEIVED | 11 | |
| unsuspected | 11 | |
| ENIGMATICAL | 11 | |
| 12 letters | ||
| UNDISCOVERED | 12 | |
| unclassified | 12 | |
| unimaginable | 12 | |
| UNIDENTIFIED | 12 | |
| 13 letters | ||
| PROBLEMATICAL | 13 | |
| unaccountable | 13 | |
| unprecedented | 13 | |
| 14 letters | ||
| undiscoverable | 14 | |
| 15 letters | ||
| crosswordeditor | 15 | |