- Definitions|2
- Thesaurus|788
- Abbreviations|0
| subitaneous(violent, fast, quick, swift, rushed) | |
| summary(prompt, fast, quick, rapid, instant) | |
| temerarious(adjective, careless, wild, bold, thoughtless) | |
| touchy(bad, heavy, irritable, risky, dangerous) | |
| unanticipated(violent, fast, quick) | |
| uncontrolled(violent, wild, fast, quick, thoughtless) | |
| unexpected(violent, fast, quick, summary, rapid) | |
| unforeseen(violent, fast, quick) | |
| unmindful | |
| unpremeditated(irritable, tetchy, snippy) | |
| unwise | |
| velocious(hot, quick, rapid, nimble, speedy) | |
| venturous(adjective, bad, nasty, careless, heavy) | |
| very fast | |
| very quick | |
| violent(fast, quick) | |
| wanton | |
| waspish(irritable, tetchy, snippy) | |
| wide open(expression, adjective, bold, rash, risky) | |
| willful(violent, fast, quick) |
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| APA | Smart Define. (2016). breakneck thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/breakneck/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "breakneck thesaurus" https://smartdefine.org/breakneck/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, breakneck thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/breakneck/thesaurus/synonyms>. |
| MLA | Smart Define. "breakneck thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/breakneck/thesaurus/synonyms> |