Name something people have to run to catch.
| 1 | bus | 44 |
|---|---|---|
| 1 | Bus | 44 |
| 2 | Pet | 15 |
| 2 | sphere | |
| 2 | softball | |
| 2 | soccer | |
| 2 | orb | |
| 2 | kickball | |
| 2 | hardball | |
| 2 | football | |
| 2 | ball | |
| 2 | dodgeball | |
| 3 | mongrel | |
| 3 | mutt | |
| 3 | pet | 15 |
| 3 | pooch | |
| 3 | puppy | |
| 3 | kitten | |
| 3 | hamster | |
| 3 | animal | |
| 3 | gerbil | |
| 3 | bunny | |
| 3 | canine | |
| 3 | cat | |
| 3 | dog | |
| 3 | guinea pig | |
| 4 | engine | |
| 4 | freight train | |
| 4 | locomotive | |
| 4 | train | |
| 4 | caboose |