Synonyms|509Antonyms|103|Broader|4Narrower|8Related|587
6
ineffectual(adjective, useless, competent)
4
abortive(adjective, failing)
4
feeble
4
ineffective(adjective, strong, fit, successful)
4
unsuccessful
3
futile
3
impotent(adjective, ineffectual)
3
incapable
3
sinful
3
unproductive
3
useless
2
empty
2
feckless(adjective, purpose)
2
fruitless
2
inefficient
2
inoperative
2
not helpful
2
weak
1
bootless
1
counterproductive
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APASmart Define. (2015). effectual thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/effectual/thesaurus/antonyms
ChicagoSmart Define. 2015. "effectual thesaurus" https://smartdefine.org/effectual/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2015, effectual thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/effectual/thesaurus/antonyms>.
MLASmart Define. "effectual thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/effectual/thesaurus/antonyms>