90 entries under infrequent topic. ×
| extreme(adjective, excellent, unusual, exceptional, special) | |
| insufficient(adjective, close, light, weak, slight) | |
| prodigious(adjective, excellent, extraordinary, unusual, exceptional) | |
| seldom met with(expression, adjective, idiom, inadequate, insufficient) | |
| subtile(adjective, light, fine, thin, delicate) | |
| unfrequent(adjective, exceptional, infrequency) | |
| at a premium(expression, adjective, idiom, inadequate, insufficient) | |
| distinctive(adjective, moist, pleasant, superior, sweet) | |
| memorable(adjective, great, superior, unusual, famous) | |
| unlikely(adjective, light, obscure, thin, extraordinary) | |
| astonishing(adjective, extraordinary, unusual, strange, exceptional) | |
| awe-inspiring(adjective, extraordinary, unusual, strange, exceptional) | |
| conspicuous(adjective, great, solid, extraordinary, unusual) | |
| eminent(adjective, great, fine, extraordinary, unusual) | |
| far-out(adjective, extraordinary, unusual, strange, exceptional) | |
| few and far between(expression, adjective, idiom, slight, thin) | |
| out of the ordinary(expression, adjective, idiom, separate, extraordinary) | |
| prominent(adjective, great, solid, extraordinary, unusual) | |
| unheard of(verb, expression, adjective, phrasal verb, light) | |
| wanting(adjective, close, light, weak, poor) |
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| APA | Smart Define. (2016). rare thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/rare/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rare thesaurus" https://smartdefine.org/rare/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2016, rare thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/rare/thesaurus/synonyms>. |
| MLA | Smart Define. "rare thesaurus" 14 March 2016. Web. 29 September 2026. <https://smartdefine.org/rare/thesaurus/synonyms> |