Synonyms|211Antonyms|2|Broader|1Narrower|4Related|60
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know-nothing
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knucklehead
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loggerhead
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lout
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lump
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meat-head
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meathead
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mentally ill(expression, idiom)
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mindless
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misfit
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misfits
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mome
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muggins
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naive
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nimrod
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ninnyhammer
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noddy
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noodle
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nothing to it(noun, expression, idiom, turkey, dunderhead)
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off his rocker(expression, idiom)
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APASmart Define. (2015). birdbrain thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/birdbrain/thesaurus/synonyms
ChicagoSmart Define. 2015. "birdbrain thesaurus" https://smartdefine.org/birdbrain/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, birdbrain thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/birdbrain/thesaurus/synonyms>.
MLASmart Define. "birdbrain thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/birdbrain/thesaurus/synonyms>