4
maniacal(adjective, silly, foolish, crazy, mad)
4
non compos mentis(adjective, law, sane)
4
off the wall(expression, adjective, idiom, light, unusual)
4
tomfool(adjective, knowledge, ability, informal, foolish)
4
unearthly(adjective, knowledge, ability)
4
unhinged(adjective, simple, silly, foolish, mad)
4
unrealistic(silly, foolish, unwise, impractical)
4
unsound(adjective, wrong, silly, foolish, stupid)
3
capricious(adjective, characteristic, person, behavior)
3
clownish
3
disordered(adjective, sane)
3
empty-headed
3
gonzo(adjective, characteristic, person, behavior)
3
illogical(adjective, wrong, silly, foolish, sense)
3
imbecile
3
infatuated
3
maniac(noun, adjective, sane)
3
mental(adjective, simple, silly, foolish, mad)
3
mentally ill(adjective, sane)
3
mindless(adjective, wrong, careless, silly, foolish)
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APASmart Define. (2016). wacky thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/wacky/thesaurus/synonyms
ChicagoSmart Define. 2016. "wacky thesaurus" https://smartdefine.org/wacky/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, wacky thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/wacky/thesaurus/synonyms>.
MLASmart Define. "wacky thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/wacky/thesaurus/synonyms>