22 entries under fit topic. ×

7
powerful(adjective, strong, effective, successful)
7
strong(adjective, successful)
6
effective(adjective, strong, successful, productive)
5
effectual(adjective, strong, successful)
5
efficient(adjective, strong, weak, delicate)
5
potent(adjective, strong, weak, soft)
5
successful(adjective, strong)
4
competent(adjective, strong, successful)
4
fruitful(adjective, strong, successful)
4
productive(adjective, strong, successful)
3
able(adjective, strong, slow, inadequate)
3
profitable(adjective, strong, successful)
3
useful(adjective, strong, successful)
3
worthwhile(adjective, strong, successful)
2
adequate(adjective, strong, successful)
2
capable(adjective, strong, successful)
2
sufficient(adjective, strong, successful)
1
dexterous(adjective, strong, successful)
1
expert(adjective, strong, successful)
1
skillful(adjective, strong, successful)
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APASmart Define. (2016). ineffective thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/ineffective/thesaurus/antonyms
ChicagoSmart Define. 2016. "ineffective thesaurus" https://smartdefine.org/ineffective/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2016, ineffective thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/ineffective/thesaurus/antonyms>.
MLASmart Define. "ineffective thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/ineffective/thesaurus/antonyms>