150 entries under foolish topic. ×

2
bonkers(adjective, silly, unwise)
2
cockamamy(silly, thoughtless, unwise, unintelligent)
2
dull(silly, stupid, unintelligent, unaware)
2
feeble-minded(stupid, impractical, half-baked, doomed)
2
flaky(adjective, light, wild, silly)
2
ill-advised(dull, simple, wrong, false)
2
imprudent(adjective, weak, simple, wrong, false)
2
kooky(adjective, weak, simple, unusual, wild)
2
lunatic(adjective, weak, simple, silly)
2
pointless(adjective, dull, simple, slow, silly)
2
screwball(adjective, silly, unwise)
2
simple(adjective, dull, weak, silly)
1
foolhardy(adjective, silly, stupid, fantastic)
1
aberrant(fantastic, monstrous, distorted, misshapen)
1
ape(silly, unwise)
1
backward(stupid, impractical, half-baked, doomed)
1
bananas
1
bats in the belfry(expression, idiom, silly, unwise)
1
berserk(silly, unwise)
1
beyond all reason(expression, idiom, silly, fantastic)
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APASmart Define. (2015). ludicrous thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/ludicrous/thesaurus/synonyms
ChicagoSmart Define. 2015. "ludicrous thesaurus" https://smartdefine.org/ludicrous/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, ludicrous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/ludicrous/thesaurus/synonyms>.
MLASmart Define. "ludicrous thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/ludicrous/thesaurus/synonyms>