- Definitions|2
- Thesaurus|2.3k
- Abbreviations|0
31 entries under adjective topic. ×
| effective | |
| efficient | |
| powerful | |
| effectual(competent, influential, authoritative) | |
| competent | |
| convenient(appropriate, useful) | |
| efficacious | |
| fruitful | |
| potent | |
| productive | |
| strong | |
| useful | |
| adequate | |
| good | |
| operative(active, passive, influential, functioning) | |
| real | |
| sufficient | |
| valid | |
| able | |
| actual |
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| APA | Smart Define. (2016). ineffectual thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/ineffectual/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "ineffectual thesaurus" https://smartdefine.org/ineffectual/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, ineffectual thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/ineffectual/thesaurus/antonyms>. |
| MLA | Smart Define. "ineffectual thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/ineffectual/thesaurus/antonyms> |