Synonyms|45Antonyms|0|Broader|0Narrower|0Related|1
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irrational
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kooky
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loco
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loony
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lunatic
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mad
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mental
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meshuga
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non compos mentis
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not all there
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nuts
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nutty
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of unsound mind
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off-the-wall
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off one's chump
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off one's rocker
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off one's trolley
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out to lunch
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potty
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psychotic
15 years ago|552 views|share |citing 
APASmart Define. (2011). off the rails thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/off_the_rails/thesaurus/synonyms
ChicagoSmart Define. 2011. "off the rails thesaurus" https://smartdefine.org/off_the_rails/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2011, off the rails thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/off_the_rails/thesaurus/synonyms>.
MLASmart Define. "off the rails thesaurus" 29 May 2011. Web. 23 September 2026. <https://smartdefine.org/off_the_rails/thesaurus/synonyms>