Synonyms|288Antonyms|134|Broader|5Narrower|7Related|1.5k
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absonant
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absonous
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adulatory
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allegedly
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anecdotal
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apparently
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assailable(poor, implausible, unconvincing)
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assumed(adjective, senseless, unwarranted, wanton, gratuitous)
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barbarian
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barbaric
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bogus
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bootless(adjective, empty, worthless, frivolous, ineffective)
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brainless(foolish, unreasonable, illogical)
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buckshee
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claptrap
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cockamamie(foolish, unreasonable, illogical)
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contemptible(poor, implausible, unconvincing)
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controvertible(poor, implausible, unconvincing)
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deed
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delirious(foolish, unreasonable, illogical)
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APASmart Define. (2015). groundless thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/groundless/thesaurus/synonyms
ChicagoSmart Define. 2015. "groundless thesaurus" https://smartdefine.org/groundless/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, groundless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/groundless/thesaurus/synonyms>.
MLASmart Define. "groundless thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/groundless/thesaurus/synonyms>