| Answer | Crossword Clue |
|---|---|
| MACH | Jet speed category |
| MACH | Jet speed |
| MACH | Jet speed unit |
| MACH | Jet speed indicator |
| MACH | Jet speed number |
| MACHS | Jet speed units |
| MACH | Jet speed measure |
| MACH | Jet-speed unit |
| MACH | Jet plane's speed unit |
| SABRE | Jet holding world's speed record. |
| MACHNUMBER | Measure of speed, in the jet age. |
