English synonyms: sonic barrier
“Perhaps part of the whip moves faster than the speed of sound, around 750 miles an hour, and the clap of noise comes as the sound barrier is broken.”
“Stearns will break the sound barrier in her record-setting jump as she plummets toward the earth at more than 800 mph.”
soul · soul-searching · soulful · sound · soundproof · soundtrack · soup · soup kitchen
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