100 entries under foolish topic. ×

2
harebrained(silly, stupid, fantastic, trivial)
2
preposterous(adjective, silly, stupid, fantastic)
1
balmy(silly, stupid, fantastic, absurd)
1
barmy(silly, trivial, unwise, playful)
1
beyond all reason(expression, idiom, silly, fantastic)
1
bizarre(silly, fantastic, unwise, impractical)
1
cockeyed(silly, fantastic, unwise, impractical)
1
derisory(silly, fantastic, unwise, impractical)
1
eccentric(silly, fantastic, unwise, impractical)
1
empty-headed(slight, careless, silly, stupid)
1
half-baked(dull, slight, silly, fantastic)
1
idiotic(adjective, dull, silly, fantastic)
1
ill-conceived(silly, fantastic, unwise, impractical)
1
ill-considered(careless, silly, stupid, trivial)
1
impracticable(silly, fantastic, unwise, impractical)
1
impractical(silly, trivial, half-baked, doomed)
1
imprudent(careless, silly, stupid, fantastic)
1
inappropriate(silly, stupid, fantastic, absurd)
1
loony(careless, silly, stupid, fantastic)
1
odd(silly, fantastic, unwise, impractical)
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APASmart Define. (2015). puerile thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/puerile/thesaurus/synonyms
ChicagoSmart Define. 2015. "puerile thesaurus" https://smartdefine.org/puerile/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, puerile thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/puerile/thesaurus/synonyms>.
MLASmart Define. "puerile thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/puerile/thesaurus/synonyms>