1
subitaneous(violent, fast, quick, swift, rushed)
1
summary(prompt, fast, quick, rapid, instant)
1
temerarious(adjective, careless, wild, bold, thoughtless)
1
touchy(bad, heavy, irritable, risky, dangerous)
1
unanticipated(violent, fast, quick)
1
uncontrolled(violent, wild, fast, quick, thoughtless)
1
unexpected(violent, fast, quick, summary, rapid)
1
unforeseen(violent, fast, quick)
1
unmindful
1
unpremeditated(irritable, tetchy, snippy)
1
unwise
1
velocious(hot, quick, rapid, nimble, speedy)
1
venturous(adjective, bad, nasty, careless, heavy)
1
very fast
1
very quick
1
violent(fast, quick)
1
wanton
1
waspish(irritable, tetchy, snippy)
1
wide open(expression, adjective, bold, rash, risky)
1
willful(violent, fast, quick)
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APASmart Define. (2016). breakneck thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/breakneck/thesaurus/synonyms
ChicagoSmart Define. 2016. "breakneck thesaurus" https://smartdefine.org/breakneck/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, breakneck thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/breakneck/thesaurus/synonyms>.
MLASmart Define. "breakneck thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/breakneck/thesaurus/synonyms>