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50 entries under insane topic. ×

1
demented(adjective, silly, foolish, mad)
1
deranged(adjective, silly, foolish, mad)
1
dingy(adjective, silly, foolish, mad)
1
dippy(adjective, silly, foolish, mad)
1
erratic(adjective, silly, foolish, mad)
1
flaky(adjective, silly, foolish, mad)
1
flipped(adjective, silly, foolish, mad)
1
fruity(adjective, silly, foolish, mad)
1
idiotic(adjective, silly, foolish, mad)
1
kooky(adjective, silly, foolish, mad)
1
lunatic(adjective, silly, foolish, mad)
1
mad(adjective, silly, foolish, unwise)
1
maniacal(adjective, silly, foolish, mad)
1
mental(adjective, silly, foolish, mad)
1
moonstruck(adjective, silly, foolish, mad)
1
nuts(adjective, silly, foolish, mad)
1
nutty(adjective, silly, foolish, mad)
1
potty(adjective, silly, foolish, mad)
1
psycho(adjective, silly, foolish, mad)
1
schizo(adjective, silly, foolish, mad)
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APASmart Define. (1970). mentally strange thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/mentally_strange/thesaurus/synonyms
ChicagoSmart Define. 1970. "mentally strange thesaurus" https://smartdefine.org/mentally_strange/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 1970, mentally strange thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/mentally_strange/thesaurus/synonyms>.
MLASmart Define. "mentally strange thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/mentally_strange/thesaurus/synonyms>