- Definitions|2
- Thesaurus|1.7k
- Abbreviations|0
| impossible(adjective, improper) | |
| unsustainable | |
| impractical(adjective, improper, impossible) | |
| unfeasible(adjective, improper, impossible, feasible) | |
| inconceivable(adjective, improper, impossible) | |
| unlikely(adjective, improper, impossible) | |
| unworkable(adjective, improper, impossible) | |
| unreasonable(adjective, improper, impossible) | |
| sentimental | |
| hopeless | |
| fantastic | |
| implausible(adjective, improper, impossible) | |
| impracticable | |
| unattainable(adjective, improper, impossible) | |
| unpractical(adjective, improper, impossible) | |
| disadvantageous(adjective, improper, impossible) | |
| futile | |
| improbable | |
| improper(adjective, impossible) | |
| inappropriate(adjective, improper, impossible) |
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| APA | Smart Define. (2015). feasible thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/feasible/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "feasible thesaurus" https://smartdefine.org/feasible/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, feasible thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/feasible/thesaurus/antonyms>. |
| MLA | Smart Define. "feasible thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/feasible/thesaurus/antonyms> |