Find Antonyms

subsonic Antonyms

Opposite of subsonic

Because the opposite of subsonic shifts with each meaning, the antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
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• adjective (Context 1)

Relating to, moving at, or capable of achieving a speed less than that of sound in a given medium (less than Mach 1).

Usage Example

"Most commercial passenger airliners are designed for efficient supersonic flight rather than breaking the sound barrier."

Strongest
supersonic
hypersonic
Strong
ultrasonic

• adjective (Context 2)

Having or relating to a frequency too low to be heard by the human ear (typically below 20 hertz).

Usage Example

"The sensitive seismograph detected ultrasonic vibrations deep within the earth long before the tremors were felt at the surface."

Strongest
ultrasonic
Strong
supersonic
audible

Similar words to subsonic

Words similar to subsonic shift depending on context. Common synonyms include:

infrasonic
See all synonyms of subsonic

• Nearby Words

subsist
subsistence
subsoil
subsonic
subsonically
subspecialist
subspecialize

Cite this Entry

Wordmom. (2026). Antonyms for Subsonic. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/subsonic
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