Synonyms|215Antonyms|56|Broader|0Narrower|0Related|93
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redundant
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senseless
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shooting blanks(expression, incompetent, wasteful, unproductive)
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slack(incompetent, wasteful, unproductive)
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slack-spined(inadequate, feeble, useless, unpolluted, vain)
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sleeveless
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slipshod(incompetent, wasteful, unproductive)
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slipslop
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sloppy(incompetent, wasteful, unproductive)
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slovenly(incompetent, wasteful, unproductive)
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stale
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superfluous
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thrown
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thrown away(verb, phrasal verb, inutility)
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time-wasting
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to no avail
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trifling
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trivial
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unavailable(inadequate, feeble, useless, vain, unsuccessful)
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undirected
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APASmart Define. (2016). inefficacious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/inefficacious/thesaurus/synonyms
ChicagoSmart Define. 2016. "inefficacious thesaurus" https://smartdefine.org/inefficacious/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, inefficacious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/inefficacious/thesaurus/synonyms>.
MLASmart Define. "inefficacious thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/inefficacious/thesaurus/synonyms>