3
dizzy(adjective, urgent)
3
furious
3
pelting(adjective, hasty)
3
rapid-fire(adjective, prompt, fast, quick, urgent)
3
steep(adjective, sharp, course, extreme, sheer)
3
unheedful(adjective, rash)
3
unsafe
3
urgent(adjective, bad, heavy, quick, risky)
3
venturesome(adjective, bad, nasty, careless, heavy)
3
whirlwind(adjective, fast, urgent)
3
winged(hot, fast, quick, nimble, speedy)
3
zippy(adjective, urgent)
2
accelerated(prompt, hot, fast, quick, speedy)
2
bold(adjective, rash, reckless, risky, impetuous)
2
brazen(adjective, rash)
2
desperate(wild, thoughtless, daring, negligent, carefree)
2
expeditive(hot, fast, quick, nimble, speedy)
2
express(fast, quick, rapid, speedy, brisk)
2
fleet-footed(adjective, urgent)
2
harum-scarum(violent, fast, quick)
10 years ago|6.8k views|share |citing 
APASmart Define. (2016). breakneck thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/breakneck/thesaurus/synonyms
ChicagoSmart Define. 2016. "breakneck thesaurus" https://smartdefine.org/breakneck/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, breakneck thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/breakneck/thesaurus/synonyms>.
MLASmart Define. "breakneck thesaurus" 1 April 2016. Web. 23 September 2026. <https://smartdefine.org/breakneck/thesaurus/synonyms>