71 entries under obtuse topic. ×

21
inane(adjective, dull, simple, careless, silly)
17
dull(adjective, quiet, flat, careless, foolish)
10
stupid(adjective, dull, simple, slow, careless)
9
dumb(adjective, simple, slow, stupid, empty)
8
unthinking(adjective, careless, indifferent, stupid, blank)
7
shallow(adjective, simple, slow, stupid, boring)
5
senseless(adjective, simple, careless, silly, foolish)
5
unintellectual(adjective, simple, slow, stupid, boring)
4
scatterbrained(adjective, simple, slow, stupid, boring)
4
simple(adjective, dull, slow, foolish, stupid)
4
unintelligent(adjective, simple, slow, indifferent, silly)
4
unmindful(adjective, unperceptive, unobservant)
4
unreasonable(adjective, careless, stupid, thoughtless, absurd)
4
unreasoning(adjective, careless, stupid, empty, unthinking)
3
brainless(adjective, dull, simple, slow, stupid)
3
daft(adjective, simple, slow, silly, stupid)
3
dense(adjective, dull, simple, slow, stupid)
3
inattentive(unperceptive, unobservant, incogitancy)
3
irrational(careless, stupid, absurd, unthinking)
2
confused(careless, stupid, unthinking, unperceptive)
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APASmart Define. (2015). vacuous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/vacuous/thesaurus/synonyms
ChicagoSmart Define. 2015. "vacuous thesaurus" https://smartdefine.org/vacuous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, vacuous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/vacuous/thesaurus/synonyms>.
MLASmart Define. "vacuous thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/vacuous/thesaurus/synonyms>