Synonyms|54Antonyms|5|Broader|0Narrower|0Related|20
5
supersonic(adjective, prompt, fast, quick)
4
inaudible
3
ultrasonics
2
acoustic
2
above(adjective, shrill)
2
acoustical
2
high(adjective, shrill)
2
phonic
2
speedy(adjective, fast, quick)
2
suprasonic(adjective, shrill)
2
transonic
2
ultrasonically
1
accelerated(prompt, fast, quick)
1
agile(prompt, fast, quick)
1
alacritous(prompt, fast, quick)
1
breakneck(prompt, fast, quick)
1
brisk(prompt, fast, quick)
1
expeditious(prompt, fast, quick)
1
express(prompt, fast, quick)
1
fleet(prompt, fast, quick)
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APASmart Define. (2015). ultrasonic thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/ultrasonic/thesaurus/synonyms
ChicagoSmart Define. 2015. "ultrasonic thesaurus" https://smartdefine.org/ultrasonic/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, ultrasonic thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/ultrasonic/thesaurus/synonyms>.
MLASmart Define. "ultrasonic thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/ultrasonic/thesaurus/synonyms>