2
dullard
2
dumbstruck(silent, dazed, astonished, thunderstruck, flabbergasted)
2
dunce
2
extinguish(verb, calm, dull, quiet, suppress)
2
fatheaded(dull, slow, stupid)
2
fatuitous
2
fopdoodle
2
futile(dull, unintelligent, witless)
2
hare-brained
2
headless
2
hush(verb, adjective, calm, dull, close)
2
hush-hush(verb, calm, dull, quiet, suppress)
2
hushed(adjective, close, quiet, soft, low)
2
idiot(noun, absence or want of intellect, idk, IDK)
2
indistinct(quiet, soft, still, confused, silent)
2
inexperienced(adjective, silly, stupid, green, fat)
2
irresponsible(foolish, stupid, impractical, half-baked, doomed)
2
keep it down(verb, expression, idiom, phrasal verb, calm)
2
leaden
2
lull(verb, calm, dull, quiet, suppress)
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APASmart Define. (2016). dumb thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/dumb/thesaurus/synonyms
ChicagoSmart Define. 2016. "dumb thesaurus" https://smartdefine.org/dumb/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, dumb thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/dumb/thesaurus/synonyms>.
MLASmart Define. "dumb thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/dumb/thesaurus/synonyms>