| Solution | Length | |
|---|---|---|
| 4 letters | ||
| guts | 4 | |
| GRIT | 4 | |
| 5 letters | ||
| sinew | 5 | |
| nails | 5 | |
| steel | 5 | |
| rigor | 5 | |
| vigor | 5 | |
| spunk | 5 | |
| 6 letters | ||
| spirit | 6 | |
| 7 letters | ||
| stamina | 7 | |
| 8 letters | ||
| solidity | 8 | |
| strength | 8 | |
| rigidity | 8 | |
| vitality | 8 | |
| severity | 8 | |
| tenacity | 8 | |
| 9 letters | ||
| TIGHTNESS | 9 | |
| substance | 9 | |
| thickness | 9 | |
| stability | 9 | |
| stiffness | 9 | |
| viscosity | 9 | |
| SOUNDNESS | 9 | |
| retention | 9 | |
| 10 letters | ||
| THICKENING | 10 | |
| RESILIENCY | 10 | |
| STRINGENCY | 10 | |
| sturdiness | 10 | |
| resistance | 10 | |
| 11 letters | ||
| TANGIBILITY | 11 | |
| 12 letters | ||
| stubbornness | 12 | |
| 13 letters | ||
| regimentation | 13 | |
| staying-power | 13 | |
| 14 letters | ||
| relentlessness | 14 | |