61 entries under special topic. ×

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few(unusual, chance, rare, uneven)
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incomparable(excellent, unusual, brilliant, rare)
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inimitable(unusual, rare)
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marvelous(excellent, brilliant, odd, bizarre)
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nondescript(character, unusual, vague, rare)
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notable(excellent, unusual, brilliant, rare)
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noteworthy(excellent, unusual, brilliant, rare)
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original(adjective, unusual, strange, rare)
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out of the way(expression, idiom, unusual, rare)
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outre(unusual, strange, rare, unexpected)
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outstanding(adjective, excellent, extraordinary, unusual)
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prodigious(excellent, unusual, strange, brilliant)
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seldom(unusual, chance, rare, uncommon)
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startling(unusual, rare)
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superior(excellent, unusual, brilliant, rare)
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surprising(unusual, strange, rare, unexpected)
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unaccustomed(unusual, odd, rare, bizarre)
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unheard of(expression, unusual, odd, rare)
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unimaginable(excellent, unusual, brilliant, rare)
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unthinkable(excellent, unusual, brilliant, rare)
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APASmart Define. (2016). irregular thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/irregular/thesaurus/synonyms
ChicagoSmart Define. 2016. "irregular thesaurus" https://smartdefine.org/irregular/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, irregular thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/irregular/thesaurus/synonyms>.
MLASmart Define. "irregular thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/irregular/thesaurus/synonyms>