Synonyms for sound barrier

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

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Even in this era of sophisticated flight there have been those who said the sound barrier would never be broken.

You have heard the sound barrier, of a plane breaking the sound barrier, bang, bang?

Again, I am going to refer to it as like a plane going through a sound barrier; bang, bang.

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.