| Solution | Length | |
|---|---|---|
| 3 letters | ||
| hid | 3 | |
| hbo | 3 | |
| sly | 3 | |
| cia | 3 | |
| 4 letters | ||
| abed | 4 | |
| seda | 4 | |
| narc | 4 | |
| 5 letters | ||
| spied | 5 | |
| slept | 5 | |
| decoy | 5 | |
| sneak | 5 | |
| privy | 5 | |
| quiet | 5 | |
| 6 letters | ||
| secret | 6 | |
| slinky | 6 | |
| sneaky | 6 | |
| shifty | 6 | |
| 8 letters | ||
| SKULKING | 8 | |
| sneaking | 8 | |
| secretly | 8 | |
| sub rosa | 8 | |
| stealthy | 8 | |
| 10 letters | ||
| UNDERNEATH | 10 | |
| 11 letters | ||
| clandestine | 11 | |
| sotto voce | 11 | |
| unobtrusive | 11 | |
| underground | 11 | |
| underhanded | 11 | |
| 13 letters | ||
| surreptitious | 13 | |
| 17 letters | ||
| with bated breath | 17 | |