28 entries under noun topic. ×
| ignorance(weakness, inefficiency) | |
| inefficacy | |
| lack(weakness, inefficiency) | |
| largeness | |
| messiness | |
| penetration | |
| tardiness | |
| uselessness |
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Efficiency on
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| APA | Smart Define. (2016). efficiency thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/efficiency/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "efficiency thesaurus" https://smartdefine.org/efficiency/thesaurus/antonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, efficiency thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/efficiency/thesaurus/antonyms>. |
| MLA | Smart Define. "efficiency thesaurus" 25 February 2016. Web. 25 September 2026. <https://smartdefine.org/efficiency/thesaurus/antonyms> |