| Solution | Length | |
|---|---|---|
| 3 letters | ||
| sly | 3 | |
| 4 letters | ||
| tube | 4 | |
| rail | 4 | |
| tram | 4 | |
| 5 letters | ||
| quiet | 5 | |
| trunk | 5 | |
| privy | 5 | |
| metro | 5 | |
| track | 5 | |
| train | 5 | |
| 6 letters | ||
| secret | 6 | |
| sunken | 6 | |
| siding | 6 | |
| shifty | 6 | |
| subway | 6 | |
| slinky | 6 | |
| sneaky | 6 | |
| 7 letters | ||
| trestle | 7 | |
| turnout | 7 | |
| roadbed | 7 | |
| unknown | 7 | |
| special | 7 | |
| shuttle | 7 | |
| railway | 7 | |
| ROADWAY | 7 | |
| SECTARY | 7 | |
| 8 letters | ||
| railroad | 8 | |
| sub rosa | 8 | |
| terminus | 8 | |
| stealthy | 8 | |
| recusant | 8 | |
| SKULKING | 8 | |
| sneaking | 8 | |
| terminal | 8 | |
| secluded | 8 | |
| variance | 8 | |
| secretly | 8 | |
| 9 letters | ||
| SIDE DOOR | 9 | |
| sidetrack | 9 | |
| RECONDITE | 9 | |
| sectarian | 9 | |
| secession | 9 | |
| rejection | 9 | |
| 10 letters | ||
| trunk line | 10 | |
| undercover | 10 | |
| resistance | 10 | |
| switchback | 10 | |
| withdrawal | 10 | |
| subversive | 10 | |
| 11 letters | ||
| unobtrusive | 11 | |
| straphanger | 11 | |
| UNDER WRAPS | 11 | |
| underhanded | 11 | |
| REPUDIATION | 11 | |
| SEQUESTERED | 11 | |
| sotto voce | 11 | |
| STREAMLINER | 11 | |
| 12 letters | ||
| schismatical | 12 | |
| subterranean | 12 | |
| 13 letters | ||
| Cannon Street | 13 | |
| rolling stock | 13 | |
| surreptitious | 13 | |
| 14 letters | ||
| streetcar line | 14 | |
| 17 letters | ||
| with bated breath | 17 | |