87 entries under rare topic. ×

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egregious(unusual, special)
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eminent(adjective, scarce, unfamiliar, uncommon)
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exotic(unusual, special)
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extreme(adjective, unusual, exceptional, special, valuable)
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far-out(adjective, scarce, unfamiliar, uncommon)
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inimitable(unusual, special)
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memorable(adjective, scarce, unfamiliar, uncommon)
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nondescript(unusual, special)
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notable(excellent, unusual, special, brilliant)
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novel(unusual, special)
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original(adjective, unusual, special, scarce)
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out of the way(expression, idiom, unusual, special)
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outre(unusual, special)
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outstanding(adjective, excellent, extraordinary, unusual, special)
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prodigious(adjective, excellent, extraordinary, unusual, special)
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prominent(adjective, scarce, unfamiliar, uncommon)
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queer(adjective, unusual, special, scarce)
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refreshing(adjective, scarce, unfamiliar, uncommon)
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shortened(adjective, inadequate, limited, insufficient)
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significant(adjective, scarce, unfamiliar, uncommon)
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APASmart Define. (2015). infrequent thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/infrequent/thesaurus/synonyms
ChicagoSmart Define. 2015. "infrequent thesaurus" https://smartdefine.org/infrequent/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, infrequent thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/infrequent/thesaurus/synonyms>.
MLASmart Define. "infrequent thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/infrequent/thesaurus/synonyms>