Crossword puzzle clue "sound barrier word"

Here are the possible solutions for sound barrier word clue

Answer
Clue
Relevancy
boom
Clue
Sound made when passing the sound barrier
Definition
to make a roaring sound
mach
Clue
Sound-barrier word
Sound barrier name
Ernst of sound-barrier fame
Definition
a number relating the speed of a body to the speed of sound
coast
Clue
Sound barrier?
Definition
to cycle without pedalling
earplug
Clue
Sound barrier
Definition
a plug for the ear
reef
Clue
Sound barrier?
Definition
to reduce the area of a sail
sst
Clue
Sound barrier breaker

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