| Solution | Length | |
|---|---|---|
| 4 letters | ||
| same | 4 | |
| 5 letters | ||
| rigid | 5 | |
| solid | 5 | |
| 6 letters | ||
| torpid | 6 | |
| smooth | 6 | |
| static | 6 | |
| stable | 6 | |
| steady | 6 | |
| 7 letters | ||
| routine | 7 | |
| uniform | 7 | |
| regular | 7 | |
| 8 letters | ||
| unfading | 8 | |
| unbroken | 8 | |
| 9 letters | ||
| unaltered | 9 | |
| quiescent | 9 | |
| UNFAILING | 9 | |
| sustained | 9 | |
| unchecked | 9 | |
| UNVARYING | 9 | |
| REMAINING | 9 | |
| unruffled | 9 | |
| robotlike | 9 | |
| steadfast | 9 | |
| 10 letters | ||
| stationary | 10 | |
| UNCHANGING | 10 | |
| SYSTEMATIC | 10 | |
| 11 letters | ||
| undestroyed | 11 | |
| undeviating | 11 | |
| 12 letters | ||
| UNCHANGEABLE | 12 | |
| 16 letters | ||
| undifferentiated | 16 | |