Synonyms|719Antonyms|192|Broader|15Narrower|2Related|1.4k

31 entries under adjective topic. ×

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capable
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energetic
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enough
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forcible
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influential(powerful, effective)
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persuasive(effective, influential)
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quick
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serious
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tangible
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viable
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vigorous
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APASmart Define. (2016). ineffectual thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/ineffectual/thesaurus/antonyms
ChicagoSmart Define. 2016. "ineffectual thesaurus" https://smartdefine.org/ineffectual/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2016, ineffectual thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/ineffectual/thesaurus/antonyms>.
MLASmart Define. "ineffectual thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/ineffectual/thesaurus/antonyms>