77 entries under dull topic. ×

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indiscreet(unintelligent, witless)
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irrelevant(unintelligent, witless)
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limited(adjective, simple, poor, inadequate)
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loser(unintelligent, witless)
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meaningless(unintelligent, witless)
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out to lunch(expression, idiom, unintelligent, witless)
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pointless(unintelligent, witless)
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puerile(unintelligent, witless)
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rash(unintelligent, witless)
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shady(adjective, dirty, doubtful, dubious)
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shortsighted(unintelligent, witless)
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simpleminded(unintelligent, witless)
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slow on uptake(expression, adjective, idiom, slow)
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stupefied(unintelligent, witless)
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trivial(unintelligent, witless)
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uncomprehending(adjective, insensitive, simple-minded, dull-witted)
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unthinking(unintelligent, witless)
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APASmart Define. (2016). thick thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/thick/thesaurus/synonyms
ChicagoSmart Define. 2016. "thick thesaurus" https://smartdefine.org/thick/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, thick thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/thick/thesaurus/synonyms>.
MLASmart Define. "thick thesaurus" 26 February 2016. Web. 26 September 2026. <https://smartdefine.org/thick/thesaurus/synonyms>