126 entries under extraordinary topic. ×
| unsubstantial(adjective, fine, thin, strange) | |
| weak(poor, strange, doubtful, dubious) | |
| wicked(adjective, good, cool, great, pleasant) | |
| individual(adjective, separate, simple, superior) | |
| alone(adjective, separate, simple, unusual) | |
| belief(strange, unbelievable, implausible, unthinkable) | |
| beyond reason(expression, strange, unbelievable, implausible) | |
| certain(adjective, superior, unusual, exceptional) | |
| definite(adjective, superior, unusual, certain) | |
| eventful(adjective, great, unusual, famous) | |
| gilt-edged(cool, great, solid, exceptional) | |
| greatest(adjective, good, great, excellent, solid) | |
| imcomprehensible(strange, unbelievable, implausible, unthinkable) | |
| implausible(strange, doubtful, dubious, unlikely) | |
| impossible(strange, unbelievable, implausible, unthinkable) | |
| impressive(adjective, unusual, superb, wonderful) | |
| incogitable(strange, unbelievable, implausible, unthinkable) | |
| insupposable(strange, unbelievable, implausible, unthinkable) | |
| mind-boggling(adjective, strange, unbelievable, implausible) | |
| momentous(adjective, great, solid, superior) |
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| APA | Smart Define. (2016). rare thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/rare/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rare thesaurus" https://smartdefine.org/rare/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2016, rare thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/rare/thesaurus/synonyms>. |
| MLA | Smart Define. "rare thesaurus" 14 March 2016. Web. 30 September 2026. <https://smartdefine.org/rare/thesaurus/synonyms> |