110 entries under adjective topic. ×

18
silly(slight, ability, foolish, stupid)
14
dizzy(slang, ability, careless, silly)
13
giddy(ability, careless, silly, foolish)
11
brainless(simple, slow, careless, silly)
11
frivolous(slight, ability, careless, silly)
10
fatuous
10
featherbrained(slight, ability, careless, silly)
10
flighty(slight, ability, careless, silly)
10
stupid(simple, careless, indifferent, silly)
9
goofy(silly, frivolous, dizzy, frothy)
9
scatterbrained(ability, careless, silly, foolish)
8
foolish(slight, careless, indifferent, silly)
8
inane(slight, silly, foolish, stupid)
8
uneducated(knowledge, ignorant, scatterbrained, untaught)
8
unintelligent(simple, slight, indifferent, foolish)
8
vacant(full, thoughtless, expressionless, scatterbrained)
8
vacuous(careless, indifferent, stupid, full)
8
witless(careless, indifferent, silly, foolish)
7
dumb(simple, silly, foolish, stupid)
7
harebrained(ability, careless, silly, foolish)
11 years ago|10k views|share |citing 
APASmart Define. (2015). empty-headed thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/empty-headed/thesaurus/synonyms
ChicagoSmart Define. 2015. "empty-headed thesaurus" https://smartdefine.org/empty-headed/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, empty-headed thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/empty-headed/thesaurus/synonyms>.
MLASmart Define. "empty-headed thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/empty-headed/thesaurus/synonyms>