- Definitions|2
- Thesaurus|449
- Abbreviations|0
| impracticality | |
| ineffectual | |
| ineffectual attempt(expression, idiom, failure) | |
| inepinutility | |
| inoperability | |
| insignificance | |
| labor lost(expression, idiom, inutility) | |
| lemon(noun, defeat, blow, failure, mistake) | |
| lip | |
| lost labor(expression, idiom, inutility) | |
| lost trouble(expression, idiom, inutility) | |
| mere farce(expression, idiom, inutility) | |
| miscalculation(noun, defeat, blow, failure, mistake) | |
| miscarriage | |
| mischance(noun, defeat, blow, failure, mistake) | |
| misfortune(noun, defeat, blow, failure, mistake) | |
| mishap(noun, defeat, blow, failure, mistake) | |
| mistake(noun, defeat, blow, failure, disaster) | |
| needlessness | |
| no go(expression, idiom, failure) |
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| APA | Smart Define. (2015). inefficacy thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/inefficacy/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "inefficacy thesaurus" https://smartdefine.org/inefficacy/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, inefficacy thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/inefficacy/thesaurus/synonyms>. |
| MLA | Smart Define. "inefficacy thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/inefficacy/thesaurus/synonyms> |