| undependable(insecure, risky, dangerous) | |
| unprotected(unstable, vulnerable, danger, dangerous, precarious) | |
| unsettled(adjective, open, delicate, uncertain, unstable) | |
| urgent(adjective, bad, heavy, significant, serious) | |
| villainous(adjective, wicked, harmful, injurious, detrimental) | |
| virulent(adjective, wicked, harmful, injurious, detrimental) | |
| volatile(adjective, delicate, wild, sensitive, unstable) | |
| wildcat | |
| severe(adjective, awful, heavy, terrible, wicked) | |
| Machiavellian(adjective, wicked) | |
| abominable(adjective, wicked) | |
| accidental(adjective, chancy) | |
| adventures | |
| adverse | |
| aimless(adjective, chancy) | |
| aleatory | |
| ambiguous(adjective, delicate, uncertain, unstable, doubtful) | |
| amoral(adjective, wicked) | |
| at the boiling point(expression, idiom, unstable, unpredictable, volatile) | |
| awful(adjective, wicked) |
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| APA | Smart Define. (2015). hazardous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hazardous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hazardous thesaurus" https://smartdefine.org/hazardous/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, hazardous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hazardous/thesaurus/synonyms>. |
| MLA | Smart Define. "hazardous thesaurus" 19 August 2015. Web. 24 September 2026. <https://smartdefine.org/hazardous/thesaurus/synonyms> |