- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
| unfriendly(adjective, adverse) | |
| unpredictable(adjective, unstable, volatile, risky, dangerous) | |
| unpropitious(adjective, adverse) | |
| unprotected(unstable, vulnerable, danger, dangerous, precarious) | |
| unsettled(adjective, upset, delicate, uncertain, anxious) | |
| urgent(adjective, bad, heavy, significant, serious) | |
| venturous(adjective, safety) | |
| almost | |
| ambiguous(adjective, delicate, uncertain, unstable, doubtful) | |
| antipathetic(adjective, adverse) | |
| at the boiling point(expression, idiom, unstable, unpredictable, volatile) | |
| awful | |
| borderline(adjective, delicate, uncertain, unstable, doubtful) | |
| burdensome(adjective, adverse) | |
| bursting(unstable, unpredictable, volatile) | |
| calamitous(adjective, adverse) | |
| charged(adjective, unstable, unpredictable, volatile) | |
| consequential(adjective, heavy, wild, significant, unstable) | |
| contingent(adjective, delicate, uncertain, unstable, doubtful) | |
| controvertible |
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| APA | Smart Define. (2015). perilous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/perilous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "perilous thesaurus" https://smartdefine.org/perilous/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, perilous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/perilous/thesaurus/synonyms>. |
| MLA | Smart Define. "perilous thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/perilous/thesaurus/synonyms> |