- Definitions|2
- Thesaurus|1.2k
- Abbreviations|0
25 entries under adjective topic. ×
| ineffectual(useless, competent) | |
| abortive | |
| feeble | |
| ineffective(strong, fit, successful) | |
| unsuccessful | |
| futile | |
| impotent | |
| incapable | |
| unproductive | |
| useless | |
| feckless | |
| fruitless | |
| inefficient | |
| weak | |
| idle | |
| incompetent | |
| inefficacious | |
| non-beneficial(effect, result, outcome) | |
| worthless | |
| dependent(strong, power, valid, legal) |
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| APA | Smart Define. (2015). effectual thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/effectual/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "effectual thesaurus" https://smartdefine.org/effectual/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, effectual thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/effectual/thesaurus/antonyms>. |
| MLA | Smart Define. "effectual thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/effectual/thesaurus/antonyms> |