| Solution | Length | |
|---|---|---|
| 2 letters | ||
| PS | 2 | |
| 3 letters | ||
| eke | 3 | |
| add | 3 | |
| tag | 3 | |
| 5 letters | ||
| rider | 5 | |
| affix | 5 | |
| addin | 5 | |
| addto | 5 | |
| annex | 5 | |
| addon | 5 | |
| 6 letters | ||
| ekeout | 6 | |
| enrich | 6 | |
| suffix | 6 | |
| insert | 6 | |
| sequel | 6 | |
| ADD ON | 6 | |
| Add to | 6 | |
| 7 letters | ||
| dietary | 7 | |
| recruit | 7 | |
| adjunct | 7 | |
| augment | 7 | |
| fortify | 7 | |
| refrain | 7 | |
| addonto | 7 | |
| codicil | 7 | |
| 8 letters | ||
| addendum | 8 | |
| appendix | 8 | |
| SEQUITUR | 8 | |
| ADD ONTO | 8 | |
| addition | 8 | |
| 9 letters | ||
| swan song | 9 | |
| subscript | 9 | |
| tailpiece | 9 | |
| appendage | 9 | |
| secondary | 9 | |
| reinforce | 9 | |
| 10 letters | ||
| strengthen | 10 | |
| SIDE ISSUE | 10 | |
| subsidiary | 10 | |
| 11 letters | ||
| acquisition | 11 | |
| unessential | 11 | |
| Side effect | 11 | |
| 13 letters | ||
| reinforcement | 13 | |