| Solution | Length | |
|---|---|---|
| 2 letters | ||
| ug | 2 | |
| 4 letters | ||
| ever | 4 | |
| tall | 4 | |
| long | 4 | |
| vast | 4 | |
| 5 letters | ||
| onend | 5 | |
| noend | 5 | |
| 6 letters | ||
| untold | 6 | |
| smooth | 6 | |
| stable | 6 | |
| steady | 6 | |
| 7 letters | ||
| running | 7 | |
| onandon | 7 | |
| endless | 7 | |
| undying | 7 | |
| serried | 7 | |
| uniform | 7 | |
| eternal | 7 | |
| nonstop | 7 | |
| 8 letters | ||
| together | 8 | |
| atlength | 8 | |
| timeless | 8 | |
| seamless | 8 | |
| TERMLESS | 8 | |
| unbroken | 8 | |
| infinite | 8 | |
| straight | 8 | |
| unending | 8 | |
| rambling | 8 | |
| 9 letters | ||
| perpetual | 9 | |
| deathless | 9 | |
| boundless | 9 | |
| endlessly | 9 | |
| universal | 9 | |
| sustained | 9 | |
| unceasing | 9 | |
| unplumbed | 9 | |
| recurrent | 9 | |
| unbounded | 9 | |
| unstopped | 9 | |
| limitless | 9 | |
| prolonged | 9 | |
| unlimited | 9 | |
| 10 letters | ||
| unmeasured | 10 | |
| PROTRACTED | 10 | |
| repetitive | 10 | |
| unrelieved | 10 | |
| UNNUMBERED | 10 | |
| 11 letters | ||
| Illimitable | 11 | |
| neverending | 11 | |
| everlasting | 11 | |
| UNREMITTING | 11 | |
| 12 letters | ||
| unfathomable | 12 | |
| imperishable | 12 | |
| 13 letters | ||
| stretched out | 13 | |
| UNINTERRUPTED | 13 | |
| 14 letters | ||
| unintermittent | 14 | |
| sesquipedalian | 14 | |
| 15 letters | ||
| uncircumscribed | 15 | |
| 16 letters | ||
| without stopping | 16 | |
| undifferentiated | 16 | |