- Definitions|1
- Thesaurus|2.6k
- Abbreviations|0
42 entries under extraordinary topic. ×
| preposterous(adjective, weak, great, simple, knowledge) | |
| cockeyed(adjective, knowledge, ability, informal) | |
| cockamamie(adjective, weak, great, simple) | |
| flaky(silly, foolish, amazing, dubious) | |
| kooky(adjective, weak, great, simple) | |
| astonishing(amazing, dubious, incredible) | |
| beyond belief(expression, amazing, incredible) | |
| doubtful(amazing, dubious, astonishing, incredible) | |
| dubious(amazing, astonishing, incredible) | |
| far-fetched(amazing, incredible) | |
| flimsy(amazing, incredible) | |
| for the birds(expression, idiom, amazing, dubious) | |
| full of holes(expression, idiom, amazing, dubious) | |
| implausible(amazing, incredible) | |
| impossible(silly, amazing, ridiculous, absurd) | |
| improbable(amazing, incredible) | |
| incogitable(amazing, dubious, astonishing, incredible) | |
| inconceivable(amazing, incredible) | |
| incredible(silly, amazing, ridiculous, absurd) | |
| lamebrained(amazing, dubious, astonishing, incredible) |
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| APA | Smart Define. (2015). harebrained thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/harebrained/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "harebrained thesaurus" https://smartdefine.org/harebrained/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, harebrained thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/harebrained/thesaurus/synonyms>. |
| MLA | Smart Define. "harebrained thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/harebrained/thesaurus/synonyms> |