172 entries under foolish topic. ×

5
round the bend(expression, idiom, silly, mad)
5
tomfool(adjective, knowledge, ability)
5
unstable(false, mad, unreasonable, ill)
5
unthinking(adjective, unreasonable, illogical)
4
disconnected(adjective, unreasonable, chaotic, illogical)
4
dull
4
fantastic(adjective, weak, simple, strange, silly)
4
flaky(adjective, simple, silly, crazy)
4
hare-brained(adjective, silly, crazy, zany)
4
imbecile
4
imprudent(adjective, weak, simple, silly)
4
incoherent(adjective, hot, unreasonable, chaotic)
4
reasonless(unreasonable, illogical, insanity)
4
schizo(adjective, silly, mad, unwise)
4
strange(adjective, wild, silly, crazy)
4
unrealistic(adjective, silly, fantastic, unwise)
4
unwise(adjective, weak, simple, silly)
4
weird(adjective, wild, strange, silly)
4
zany(adjective, weak, simple, knowledge, ability)
3
erratic(adjective, wild, strange, silly)
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APASmart Define. (2015). insane thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/insane/thesaurus/synonyms
ChicagoSmart Define. 2015. "insane thesaurus" https://smartdefine.org/insane/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, insane thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/insane/thesaurus/synonyms>.
MLASmart Define. "insane thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/insane/thesaurus/synonyms>