Synonyms for sonic barrier

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

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An accelerating, effortless flight, a faint tremor as they passed the sonic barrier, then no sensory impressions at all.

RELATED WORDS AND SYNONYMS FOR SONIC BARRIER

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