96 entries under foolish topic. ×

4
unhinged(adjective, simple, crazy, well)
3
asinine(adjective, simple, silly, stupid)
3
bananas(adjective, slang, crazy, mad)
3
loony(adjective, informal, unreasonable, sane)
3
wacky(adjective, wrong, slang, silly)
2
crackers(simple, silly, crazy, sick)
2
immature(unstable, deficient, incomplete, inexact)
2
mindless(adjective, wrong, silly, stupid)
2
misguided(bad, wrong, false, rash)
2
rash
2
reasonless(unreasonable, worthless, unacceptable, illogical)
2
ridiculous(adjective, wrong, silly, stupid)
2
thoughtless(rash, risky)
2
unreasoning(unreasonable, illogical)
2
unthinking(unreasonable, illogical)
2
witless(simple, silly, rash, risky)
1
aberrant(unreasonable, fantastic, illogical)
1
delirious(crazy, unreasonable, insane, irrational)
1
distracted(crazy, fantastic, insane, irrational)
1
flaky(adjective, wrong, silly, stupid)
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APASmart Define. (2015). unsound thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unsound/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsound thesaurus" https://smartdefine.org/unsound/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unsound thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unsound/thesaurus/synonyms>.
MLASmart Define. "unsound thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/unsound/thesaurus/synonyms>