| SPEEDOFLIGHT | The physical constant c, which is equal to 186,000 miles per second (5,2,5) |
| LIGHT | It can move at 186,000 miles per second |
| LIGHTSPEED | 186,000 miles per second |
| FASTERTHANLIGHT | Traveling at 186,500 miles per second |
| SPEED | 186,000 miles/second, for light |
| RADIO | The "R" in F.R.C., which later became the F.C.C. |
| IMPS | Little devils at one mile per second! |
| AFFLECK | PICTURE C Which film star Ben was she married to? (7) |
| WONDERWOMAN | PICTURE C Which superhero is she famous for playing? (6,5) |
| WATCH | Timepiece in box C which has become synonymous with Switzerland (5) |
| METRO | Travelling around 600,000 miles per day, the rapid transit system in Paris which is a symbol of the |
| SQUALL | Name for a sudden wind-speed increase of 8 metres per second (18 miles per hour) or more, for one minute or longer. (6) |
| TIGER | It can run up to 40 miles per hour |
| OSTRICH | Its max speed is roughly 30 miles per hour |
| GALE | Wind that ranges from 39 to 54 miles per hour |
| BLACKMARLIN | This fish can reach up to 80 miles per hour, swimmingly |
| RATE | Miles per hour or words per minute, e.g. |
| HARES | Creatures that can run up to 50 miles per hour |
| MOTORCYCLE | On which Glenn Curtiss reached a speed of 136 miles per hour |
| TORN | A hundred miles per hour is about right when lacerated (4) |
