- Definitions|2
- Thesaurus|4.6k
- Abbreviations|0
| indeterminate(adjective, uncertain, definite, vague) | |
| insecure(adjective, strong, uncertain, steady, worried) | |
| mercurial | |
| precarious(adjective, strong, stable, doubtful, tricky) | |
| surreal(adjective, true) | |
| unclear(adjective, clear) | |
| unstable(adjective, clear, sound, steady) | |
| vague(adjective, clear, plain, definite) | |
| unpredictable(adjective, predictable) | |
| fluky(adjective, chance) | |
| hesitant(adjective, uncertain, waiting) | |
| debatable(adjective, controversial) | |
| distrustful(adjective, disbelieving) | |
| equivocal(adjective, uncertain, doubtful) | |
| iffy(adjective, uncertain) | |
| questionable | |
| unsealed | |
| arguable(adjective, debatable) | |
| baseless | |
| dicey(adjective, safe, risky) |
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| APA | Smart Define. (2016). certain thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/certain/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "certain thesaurus" https://smartdefine.org/certain/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, certain thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/certain/thesaurus/antonyms>. |
| MLA | Smart Define. "certain thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/certain/thesaurus/antonyms> |