| Solution | Length | |
|---|---|---|
| 3 letters | ||
| age | 3 | |
| eld | 3 | |
| 4 letters | ||
| yore | 4 | |
| ruin | 4 | |
| 5 letters | ||
| olden | 5 | |
| relic | 5 | |
| 6 letters | ||
| period | 6 | |
| 7 letters | ||
| vestige | 7 | |
| ancient | 7 | |
| OLDNESS | 7 | |
| remains | 7 | |
| 8 letters | ||
| survival | 8 | |
| standing | 8 | |
| senility | 8 | |
| 9 letters | ||
| seniority | 9 | |
| stability | 9 | |
| 13 letters | ||
| primogeniture | 13 | |
| 15 letters | ||
| TIME IMMEMORIAL | 15 | |