50 entries under silly topic. ×

1
ill-considered(careless, foolish, stupid, trivial)
1
inconstant(adjective, careless, unstable, unreliable)
1
meaningless(slight, foolish, stupid, trivial)
1
puerile(slight, careless, foolish, stupid)
1
reckless(careless, stupid, unthinking, unsteady)
1
simpleminded(simple, foolish, stupid, absurd)
0
irresolute(adjective, careless, unsteady, inconstant)
0
mentally deficient(expression, foolish, stupid)
0
mentally handicapped(expression, foolish, stupid)
0
not intelligent(expression, foolish, stupid)
<123>
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APASmart Define. (2015). empty-headed thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/empty-headed/thesaurus/synonyms
ChicagoSmart Define. 2015. "empty-headed thesaurus" https://smartdefine.org/empty-headed/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, empty-headed thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/empty-headed/thesaurus/synonyms>.
MLASmart Define. "empty-headed thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/empty-headed/thesaurus/synonyms>