36 entries under foolish topic. ×

18
silly(adjective, slight, ability, stupid)
14
dizzy(adjective, slang, ability, careless, silly)
13
giddy(adjective, ability, careless, silly)
11
brainless(adjective, simple, slow, careless, silly)
10
featherbrained(adjective, slight, ability, careless, silly)
10
flighty(adjective, slight, ability, careless, silly)
10
stupid(adjective, simple, careless, indifferent, silly)
9
scatterbrained(adjective, ability, careless, silly)
8
inane(adjective, slight, silly, stupid)
8
unintelligent(adjective, simple, slight, indifferent)
8
witless(adjective, careless, indifferent, silly)
7
dumb(adjective, simple, silly, stupid)
7
harebrained(adjective, ability, careless, silly)
7
simple(adjective, slight, silly, stupid)
6
mindless(adjective, careless, silly, stupid)
5
idiotic(adjective, silly, stupid, trivial)
5
moronic(adjective, silly, stupid)
5
senseless(careless, silly, stupid, trivial)
5
unthinking(adjective, slight, careless, indifferent, silly)
4
doltish(adjective, simple, careless, silly)
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APASmart Define. (2015). empty-headed thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/empty-headed/thesaurus/synonyms
ChicagoSmart Define. 2015. "empty-headed thesaurus" https://smartdefine.org/empty-headed/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, empty-headed thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/empty-headed/thesaurus/synonyms>.
MLASmart Define. "empty-headed thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/empty-headed/thesaurus/synonyms>