Synonyms|312Antonyms|44|Broader|0Narrower|0Related|432

104 entries under fast topic. ×

2
heedless(adjective, violent, wild, quick)
2
hell-for-leather(adjective, informal)
2
high-speed(adjective, quick, rapid, speedy)
2
immediate(adjective, prompt, irritable, quick)
2
in nothing flat(expression, hot, quick, speedy)
2
lively(prompt, quick, speedy, brisk)
2
mercurial(quick, rapid, speedy, brisk)
2
nippy(adjective, rapid, swift, urgent)
2
on the double(expression, hot, quick, speedy)
2
plunging(violent, quick)
2
precipitant(violent, quick, rash, reckless)
2
precipitous(adjective, sharp, course, quick)
2
pronto(hot, quick, rapid, nimble)
2
ready(prompt, hot, quick, nimble)
2
speedball(hot, quick, summary, nimble)
2
supersonic(prompt, hot, quick, rapid)
1
alacritous(prompt, quick, summary, rapid)
1
alert(prompt, quick, rapid, speedy)
1
at full tilt(expression, adjective, idiom, quick)
1
brief(adjective, violent, quick, rapid)
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ChicagoSmart Define. 2016. "breakneck thesaurus" https://smartdefine.org/breakneck/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, breakneck thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/breakneck/thesaurus/synonyms>.
MLASmart Define. "breakneck thesaurus" 1 April 2016. Web. 26 September 2026. <https://smartdefine.org/breakneck/thesaurus/synonyms>