| Solution | Length | |
|---|---|---|
| 3 letters | ||
| arm | 3 | |
| aid | 3 | |
| 4 letters | ||
| side | 4 | |
| aide | 4 | |
| 5 letters | ||
| extra | 5 | |
| spare | 5 | |
| 6 letters | ||
| aiding | 6 | |
| second | 6 | |
| helper | 6 | |
| 7 letters | ||
| surplus | 7 | |
| helpful | 7 | |
| reserve | 7 | |
| servant | 7 | |
| serving | 7 | |
| helping | 7 | |
| 8 letters | ||
| ulterior | 8 | |
| abetting | 8 | |
| 9 letters | ||
| promotive | 9 | |
| CONDUCIVE | 9 | |
| accessory | 9 | |
| assistant | 9 | |
| ANCILLARY | 9 | |
| tributary | 9 | |
| secondary | 9 | |
| assisting | 9 | |
| 10 letters | ||
| TRANSITIVE | 10 | |
| supplement | 10 | |
| subsidiary | 10 | |
| 11 letters | ||
| superfluous | 11 | |
| subordinate | 11 | |
| subservient | 11 | |
| unessential | 11 | |
| 12 letters | ||
| supervenient | 12 | |
| 13 letters | ||
| supplementary | 13 | |