| Solution | Length | |
|---|---|---|
| 4 letters | ||
| cold | 4 | |
| hard | 4 | |
| 5 letters | ||
| stoic | 5 | |
| rocky | 5 | |
| staid | 5 | |
| stony | 5 | |
| 6 letters | ||
| stolid | 6 | |
| wooden | 6 | |
| 7 letters | ||
| robotic | 7 | |
| unmoved | 7 | |
| stoical | 7 | |
| 8 letters | ||
| UNLOVING | 8 | |
| reserved | 8 | |
| straight | 8 | |
| SOULLESS | 8 | |
| 9 letters | ||
| impassive | 9 | |
| excitable | 9 | |
| unfeeling | 9 | |
| 10 letters | ||
| phlegmatic | 10 | |
| spiritless | 10 | |
| 11 letters | ||
| UNTOUCHABLE | 11 | |
| 12 letters | ||
| unresponsive | 12 | |
| matteroffact | 12 | |
| 13 letters | ||
| unsusceptible | 13 | |
| unimpassioned | 13 | |
| dispassionate | 13 | |
| unsympathetic | 13 | |
| 14 letters | ||
| self contained | 14 | |
| unaffectionate | 14 | |
| 15 letters | ||
| uncompassionate | 15 | |
| UNDEMONSTRATIVE | 15 | |