204 entries under foolish topic. ×

1
mental(silly, stupid, unwise)
1
moonstruck(adjective, silly, stupid, insane)
1
nerdy(weak, simple, silly, thoughtless)
1
nutty as fruitcake(expression, idiom, wrong, wild, silly)
1
of unsound mind(expression, idiom, stupid, crazy)
1
off the wall(expression, adjective, idiom, silly)
1
out of all reason(expression, idiom, silly, fantastic)
1
profligate(adjective, rough, crazy, excessive)
1
psychopathic(wrong, wild, silly, stupid)
1
psychotic(silly, stupid, crazy, mad)
1
rabid(adjective, wrong, severe, rough, harsh)
1
raging(wrong, wild, silly, stupid)
1
schizophrenic(wrong, wild, silly, stupid)
1
simple(weak, silly, thoughtless, unwise)
1
sophistic(unreasonable, irrational, illogical, unreasoned)
1
specious(unreasonable, irrational, illogical, unreasoned)
1
touched(silly, stupid, unwise)
1
unbalanced(adjective, wrong, wild, silly)
1
unconventional(adjective, severe, harsh, exceptional)
1
unhinged(silly, stupid, unwise)
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APASmart Define. (2015). preposterous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/preposterous/thesaurus/synonyms
ChicagoSmart Define. 2015. "preposterous thesaurus" https://smartdefine.org/preposterous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, preposterous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/preposterous/thesaurus/synonyms>.
MLASmart Define. "preposterous thesaurus" 2 September 2015. Web. 23 September 2026. <https://smartdefine.org/preposterous/thesaurus/synonyms>