| Solution | Length | |
|---|---|---|
| 3 letters | ||
| key | 3 | |
| 4 letters | ||
| need | 4 | |
| nice | 4 | |
| 5 letters | ||
| vital | 5 | |
| acute | 5 | |
| sharp | 5 | |
| 6 letters | ||
| severe | 6 | |
| primal | 6 | |
| urgent | 6 | |
| 7 letters | ||
| serious | 7 | |
| essence | 7 | |
| radical | 7 | |
| pivotal | 7 | |
| primary | 7 | |
| probing | 7 | |
| doordie | 7 | |
| seminal | 7 | |
| 8 letters | ||
| critical | 8 | |
| primeval | 8 | |
| piercing | 8 | |
| pristine | 8 | |
| pregnant | 8 | |
| PRESSING | 8 | |
| decisive | 8 | |
| 9 letters | ||
| strategic | 9 | |
| important | 9 | |
| essential | 9 | |
| primitive | 9 | |
| searching | 9 | |
| 10 letters | ||
| UNDERLYING | 10 | |
| primordial | 10 | |
| 11 letters | ||
| rudimentary | 11 | |
| 12 letters | ||
| allimportant | 12 | |
| 13 letters | ||
| indispensable | 13 | |
| 14 letters | ||
| Discriminating | 14 | |