Synonyms|719Antonyms|192|Broader|15Narrower|2Related|1.4k
9
impactful
8
effective(adjective, competent)
7
efficient
6
helpful
6
powerful
5
effectual(adjective, competent, influential, authoritative)
5
competent
5
convenient(adjective, appropriate, useful)
4
efficacious
4
fruitful
4
functional
4
potent
4
productive(adjective, competent)
4
strong
4
successful
4
useful
2
cost effective
2
adequate(adjective, competent)
2
expedient
2
good
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APASmart Define. (2016). ineffectual thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ineffectual/thesaurus/antonyms
ChicagoSmart Define. 2016. "ineffectual thesaurus" https://smartdefine.org/ineffectual/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, ineffectual thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ineffectual/thesaurus/antonyms>.
MLASmart Define. "ineffectual thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/ineffectual/thesaurus/antonyms>