110 entries under adjective topic. ×

3
unreasonable(careless, stupid, thoughtless, absurd)
3
unschooled(ignorant, scatterbrained, untaught, flighty)
3
weak-minded
2
birdbrained(slang, ability)
2
bubbleheaded(careless, silly, unstable, unreliable)
2
feather-headed
2
frothy(slight, ability, careless, trivial)
2
gormless
2
imbecile
2
lighthearted
2
lumpish
2
shallow(ignorant, unintelligent)
2
skittish(scatterbrained, flighty)
2
stolid
2
thick-witted
1
absent-minded(careless, stupid, vague, unthinking)
1
bemused(careless, silly, unsteady, inconstant)
1
bovine(careless, stupid, unthinking, obtuse)
1
capricious(careless, silly, unstable, unreliable)
1
careless(wild, foolish, stupid, vague)
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APASmart Define. (2015). empty-headed thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/empty-headed/thesaurus/synonyms
ChicagoSmart Define. 2015. "empty-headed thesaurus" https://smartdefine.org/empty-headed/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, empty-headed thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/empty-headed/thesaurus/synonyms>.
MLASmart Define. "empty-headed thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/empty-headed/thesaurus/synonyms>