498 entries under adjective topic. ×

6
cockamamy(silly, thoughtless, unintelligent, nonsensical)
6
dopy
6
empty
6
feeble-minded(silly, stupid, vague, impulsive)
6
flighty(simple, slight, careless, silly)
6
fond
6
fool
6
giddy(simple, rough, careless, silly)
6
goosy
6
hasty(careless, impulsive, rash, risky)
6
impetuous(rough, careless, crazy, thoughtless)
6
insensate(dull, simple, ability, slow)
6
madcap(rough, careless, silly, crazy)
6
obtuse(dull, simple, careless, silly)
6
sappy(knowledge, slang, ability)
6
useless(offensive, rude, stupid, vulgar)
6
weak-minded(ability, planned)
5
antic
5
barmy(careless, silly, stupid, trivial)
5
careless(wrong, wild, silly, stupid)
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APASmart Define. (2016). foolish thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/foolish/thesaurus/synonyms
ChicagoSmart Define. 2016. "foolish thesaurus" https://smartdefine.org/foolish/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, foolish thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/foolish/thesaurus/synonyms>.
MLASmart Define. "foolish thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/foolish/thesaurus/synonyms>