- Definitions|2
- Thesaurus|364
- Abbreviations|0
72 entries under adjective topic. ×
| ineffective(affect, useless, incompetent, unsound) | |
| ineffectual(skill, affect, inadequate, feeble) | |
| useless(wild, inferior, affect, inadequate) | |
| bootless(inferior, inadequate, useless, trivial) | |
| unavailing(inferior, inadequate, useless, trivial) | |
| vain(inferior, inadequate, feeble, useless) | |
| fruitless(inferior, inadequate, useless, trivial) | |
| futile(inferior, inadequate, feeble, useless) | |
| inefficient(weak, skill, inferior, affect) | |
| inoperative(weak, skill, inferior, inadequate) | |
| unsuccessful(inferior, inadequate, limited, feeble) | |
| abortive(inferior, inadequate, useless, trivial) | |
| unproductive(inadequate, feeble, useless, trivial) | |
| impotent(weak, skill, inferior, inadequate) | |
| inadequate(skill, feeble, useless, unfit) | |
| nugatory(inferior, inadequate, feeble, useless) | |
| feckless(inferior, inadequate, limited, feeble) | |
| worthless(inferior, inadequate, useless, trivial) | |
| barren(inadequate, useless, trivial, unsound) | |
| null(inferior, inadequate, feeble, useless) |
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| APA | Smart Define. (2016). inefficacious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/inefficacious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "inefficacious thesaurus" https://smartdefine.org/inefficacious/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, inefficacious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/inefficacious/thesaurus/synonyms>. |
| MLA | Smart Define. "inefficacious thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/inefficacious/thesaurus/synonyms> |