| unhealthful | |
| unintentional | |
| unmindful | |
| unplanned | |
| unsure(adjective, insecure, irresponsible) | |
| unthoughtful(adjective, insecure, tactful, solemn, irresponsible) | |
| untried | |
| untrue | |
| untrustworthy | |
| untruthful | |
| unwholesome | |
| venomous | |
| violable | |
| wounded | |
| debatable | |
| debated | |
| deceitful | |
| wounding | |
| acute | |
| adventure(state, feeling, caution) |
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| APA | Smart Define. (2016). safe thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/safe/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "safe thesaurus" https://smartdefine.org/safe/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, safe thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/safe/thesaurus/antonyms>. |
| MLA | Smart Define. "safe thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/safe/thesaurus/antonyms> |