| Solution | Length | |
|---|---|---|
| 4 letters | ||
| snug | 4 | |
| CALK | 4 | |
| seal | 4 | |
| 5 letters | ||
| leaky | 5 | |
| stiff | 5 | |
| proof | 5 | |
| tight | 5 | |
| caulk | 5 | |
| 6 letters | ||
| tender | 6 | |
| sealed | 6 | |
| CALKED | 6 | |
| sealup | 6 | |
| 7 letters | ||
| staunch | 7 | |
| caulked | 7 | |
| 8 letters | ||
| LEAKLESS | 8 | |
| 9 letters | ||
| resistant | 9 | |
| WINDPROOF | 9 | |
| rainproof | 9 | |
| 10 letters | ||
| soundproof | 10 | |
| waterproof | 10 | |
| Leak proof | 10 | |
| 11 letters | ||
| IMPREGNABLE | 11 | |
| 12 letters | ||
| WEATHERPROOF | 12 | |
| shatterproof | 12 | |
| 13 letters | ||
| punctureproof | 13 | |