70 entries under unintelligent topic. ×

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laughable(dull, witless)
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loser(dull, witless)
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nonsensical(dull, foolish, stupid, dumb)
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not bright(expression, adjective, simple, slow, stupid)
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out to lunch(expression, idiom, dull, witless)
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plodding(adjective, sluggish, obtuse)
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rash(dull, witless)
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scatterbrained(adjective, simple, slow, stupid, boring)
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shortsighted(dull, witless)
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trivial(dull, witless)
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APASmart Define. (2015). dense thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/dense/thesaurus/synonyms
ChicagoSmart Define. 2015. "dense thesaurus" https://smartdefine.org/dense/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, dense thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/dense/thesaurus/synonyms>.
MLASmart Define. "dense thesaurus" 17 July 2015. Web. 29 September 2026. <https://smartdefine.org/dense/thesaurus/synonyms>