| Answer | Crossword Clue |
|---|---|
| CHOO | When repeated, a train sound |
| CHOO | When repeated, train sound |
| CHOO | When repeated, a child's train |
| CHOO | When repeated, a toy train |
| WAH | When repeated, a trumpet sound |
| WAH | When repeated, a trombone sound |
| BEEP | When repeated, Road Runner's sound |
| TUT | When repeated, sound of disapproval |
| PUTT | When repeated, an engine sound |
