- Definitions|2
- Thesaurus|251
- Abbreviations|0
| incongruity(noun, absurdity) | |
| invalidity(noun, absurdity) | |
| irrationality(noun, absurdity) | |
| ludicrousness(noun, absurdity) | |
| meaninglessness(noun, absurdity) | |
| no-go | |
| no chance | |
| non-feasibility(noun, impossible to do) | |
| nonsatisfiability(noun, impossible to do) | |
| nonsense(noun, absurdity) | |
| outlandishness(noun, absurdity) | |
| preposterousness(noun, absurdity) | |
| prodigiousness | |
| questionability | |
| rarity | |
| silliness(noun, absurdity) | |
| unrealizability(noun, impossible to do) | |
| cannot | |
| castle in the air | |
| choice |
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| APA | Smart Define. (2015). impossibility thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/impossibility/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impossibility thesaurus" https://smartdefine.org/impossibility/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, impossibility thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/impossibility/thesaurus/synonyms>. |
| MLA | Smart Define. "impossibility thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/impossibility/thesaurus/synonyms> |