| Solution | Length | |
|---|---|---|
| nsa | 3 | |
| nsc | 3 | |
| mum | 3 | |
| 5 letters | ||
| muted | 5 | |
| shush | 5 | |
| privy | 5 | |
| still | 5 | |
| quash | 5 | |
| quiet | 5 | |
| sneak | 5 | |
| 6 letters | ||
| stifle | 6 | |
| untold | 6 | |
| SIT ON | 6 | |
| squash | 6 | |
| secret | 6 | |
| 7 letters | ||
| private | 7 | |
| onthedl | 7 | |
| smother | 7 | |
| tsecret | 7 | |
| ontheqt | 7 | |
| silence | 7 | |
| STIFLED | 7 | |
| secrecy | 7 | |
| squelch | 7 | |
| repress | 7 | |
| 8 letters | ||
| ulterior | 8 | |
| stealthy | 8 | |
| throttle | 8 | |
| suppress | 8 | |
| unspoken | 8 | |
| 9 letters | ||
| topsecret | 9 | |
| unuttered | 9 | |
| smothered | 9 | |
| 10 letters | ||
| top-secret | 10 | |
| underwraps | 10 | |
| unrevealed | 10 | |
| undercover | 10 | |
| soft pedal | 10 | |
| restricted | 10 | |
| shut down | 10 | |
| SUPPRESSED | 10 | |
| PRIVILEGED | 10 | |
| 11 letters | ||
| UNDER WRAPS | 11 | |
| unutterable | 11 | |
| UNDISCLOSED | 11 | |
| 13 letters | ||
| undisclosable | 13 | |
| surreptitious | 13 | |