noncompos mentis
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lunatic — Synonyms and related words: abnormal, absurd, aliene, ass, balmy, batty, bedlamite, bereft of reason, borderline case, born fool, brainsick, buffoon, clown, crackbrain, crackbrained, cracked, crackpot, crank, crazed, crazy, cuckoo, daft, deluded … Moby Thesaurus