Synonyms|46Antonyms|29|Broader|20Narrower|49Related|167
7
unprofitable(adjective, ineffective, ineffectual, unproductive, impotent)
7
useless(adjective, ineffective, ineffectual, unproductive, impotent)
7
weak(adjective, ineffective, ineffectual, unproductive, impotent)
7
worthless(adjective, ineffective, ineffectual, unproductive, impotent)
6
effete(adjective, ineffective, ineffectual, unproductive, impotent)
6
frail(adjective, ineffective, ineffectual, unproductive, impotent)
6
gutless(adjective, ineffective, ineffectual, unproductive, impotent)
6
infirm(adjective, ineffective, ineffectual, unproductive, impotent)
6
nerveless(adjective, ineffective, ineffectual, unproductive, impotent)
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APASmart Define. (2016). impactful thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/impactful/thesaurus/antonyms
ChicagoSmart Define. 2016. "impactful thesaurus" https://smartdefine.org/impactful/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, impactful thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/impactful/thesaurus/antonyms>.
MLASmart Define. "impactful thesaurus" 12 February 2016. Web. 26 September 2026. <https://smartdefine.org/impactful/thesaurus/antonyms>