- Definitions|2
- Thesaurus|2.2k
- Abbreviations|0
| looney(noun, adjective) | |
| mad as a March hare(expression, idiom, silly, foolish, mad) | |
| mad as a hatter(expression, adjective, idiom, silly, foolish) | |
| madding(adjective, crazy, mad, odd, insane) | |
| mentally deranged(expression, idiom) | |
| mentally strange(expression, silly, foolish, mad, insane) | |
| mindless(silly, foolish, mad, insane, unintelligent) | |
| mooncalf | |
| moron | |
| non compos(expression, unsound, worrier, nutter, valetudinary) | |
| not right(expression, idiom, insanity) | |
| nutty as fruitcake(expression, idiom, silly, foolish, mad) | |
| off one's chump | |
| outrageous(adjective, silly, foolish, unwise) | |
| paranoiac(noun, adjective) | |
| psychoneurotic | |
| psychopathic(adjective, silly, foolish, stupid, irrational) | |
| rash(adjective, crazy, mad, odd, insane) | |
| raving lunatic(expression, worrier, nutter, valetudinary) | |
| reasonless |
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| APA | Smart Define. (2015). lunatic thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/lunatic/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "lunatic thesaurus" https://smartdefine.org/lunatic/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, lunatic thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/lunatic/thesaurus/synonyms>. |
| MLA | Smart Define. "lunatic thesaurus" 6 August 2015. Web. 25 September 2026. <https://smartdefine.org/lunatic/thesaurus/synonyms> |