128 entries under dull topic. ×
| thick-headed(silly, foolish, stupid, unintelligent) | |
| trivial(commonplace, unintelligent, witless, hackneyed) | |
| unthinking(silly, foolish, stupid, unintelligent) | |
| blunt(adjective, heavy, stupid, impassive) | |
| boorish(adjective, slow, stupid) | |
| calm(verb, quiet, silence, hush) | |
| calm down(verb, expression, calm, quiet) | |
| fall silent(verb, expression, calm, quiet) | |
| impassive(slow, stupid, unresponsive) | |
| imperceptive(adjective, insensitive, simple-minded, dull-witted) | |
| inactive(adjective, heavy, stupid, impassive) | |
| insensitive(slow, stupid, impassive, unresponsive) | |
| irrelevant(unintelligent, witless) | |
| lethargic(slow, silly, stupid) | |
| loser(unintelligent, witless) | |
| out to lunch(expression, idiom, unintelligent, witless) | |
| passive(adjective, heavy, stupid, impassive) | |
| phlegmatic(slow, stupid, impassive, unresponsive) | |
| puerile(impractical, unintelligent, half-baked, doomed) | |
| rash(unintelligent, witless) |
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| APA | Smart Define. (2016). dumb thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/dumb/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "dumb thesaurus" https://smartdefine.org/dumb/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, dumb thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/dumb/thesaurus/synonyms>. |
| MLA | Smart Define. "dumb thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/dumb/thesaurus/synonyms> |