| 100% | MACH | 4 | It's calculated relative to the speed of sound |
| 59% | MACH | 4 | ___ number (measure of velocity relative to the speed of sound) |
| 56% | TRANSONIC | 9 | Moving close to the speed of sound |
| 47% | MACHONE | 7 | The speed of sound |
| 47% | MACHI | 5 | The speed of sound |
| 45% | SUBSONIC | 8 | Below the speed of sound |
| 45% | MACH2 | 5 | Double the speed of sound |
| 45% | SUPERSONIC | 10 | Faster than the speed of sound |
| 45% | BTEN | 4 | Apt bingo call to lose on, by the sound of it? |
| 44% | CHUCKYEAGER | 11 | First pilot to travel faster than the speed of sound |
| 44% | OPER | 4 | It's to the left of # |
| 43% | SONIC | 5 | "Service at the Speed of Sound" fast-food franchise |
| 43% | SONIC | 5 | "Service at the Speed of Sound" fast-food chain |
| 43% | SONICBOOM | 9 | Noise from a plane flying above the speed of sound |
| 43% | IMITATION | 9 | It's said to be the sincerest form of flattery |
| 43% | ONESPLACE | 9 | It's to the left of a dot |
| 42% | MACH | 4 | Physicist Ernst whose name is associated with the speed of sound |
| 42% | OTTER | 5 | It's said to have the thickest fur of any mammal |
| 42% | ALT | 3 | It's to the right of the Windows key |
| 42% | EXOCET | 6 | Anti-ship missile that skims waves at nearly the speed of sound |
| 41% | AORTA | 5 | It connects to one of the heart's four valves |
| 41% | LOVE | 4 | To Balzac, it’s “the poetry of the senses” |
| 41% | TIP | 3 | It's often equal to 20% of the bill |
| 41% | YOKE | 4 | It's attached to the necks of oxen |
| 41% | SONICBOOM | 9 | What you hear when a plane breaks the speed of sound: 2 wds. |
| 40% | GUM | 3 | It's stuck to the bottom of some school desks |
| 40% | VARIETY | 7 | It's said to be the spice of life |
| 40% | ACOUSTIC | 8 | Pertaining to the study of sound and soundwaves |
| 40% | PHONOLOGY | 9 | Related to the arrangement of sounds in language |
| 40% | GOP | 3 | 11 U.S. presidents of the 20th century belonged to it |