56 entries under foolish topic. ×
| foolhardy | |
| frantic | |
| freaky(unreasonable, illogical) | |
| frenetic | |
| imprudent | |
| incoherent(unreasonable, irrational, illogical, arbitrary) | |
| injudicious(unreasonable, illogical) | |
| kooky(unreasonable, illogical) | |
| loony(unreasonable, illogical) | |
| mindless(unreasonable, illogical) | |
| non compos mentis(expression, idiom, fantastic) | |
| of unsound mind(expression, idiom, fantastic) | |
| off-the-wall(unreasonable, illogical) | |
| raving(unreasonable, illogical) | |
| unsafe(fantastic, ill, unhealthy, frail) | |
| unthinking(unreasonable, illogical) |
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| APA | Smart Define. (2016). invalid thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/invalid/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "invalid thesaurus" https://smartdefine.org/invalid/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, invalid thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/invalid/thesaurus/synonyms>. |
| MLA | Smart Define. "invalid thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/invalid/thesaurus/synonyms> |