160 entries under special topic. ×

7
inconceivable(adjective, obscure, extraordinary, unusual, belief)
7
incredible(adjective, extraordinary, unusual, strange, exceptional)
7
isolated(adjective, separate, simple, exceptional)
7
noteworthy(adjective, great, excellent, solid, extraordinary)
7
particular(adjective, separate, simple, extraordinary, superior)
7
queer(adjective, extraordinary, unusual, strange, exceptional)
7
seldom(adjective, adverb, slight, unusual, exceptional)
7
unconventional(adjective, separate, unusual, strange, exceptional)
6
abnormal(adjective, excellent, obscure, dark, extraordinary)
6
anomalous(adjective, excellent, unusual, strange, usual)
6
first-rate(adjective, cool, great, pleasant, excellent)
6
notable(adjective, solid, extraordinary, unusual, exceptional)
6
original(adjective, separate, simple, extraordinary, unusual)
6
precious(adjective, excellent, fine, delicate, superior)
6
uncustomary(adjective, excellent, solid, extraordinary, unusual)
6
unimaginable(adjective, light, extraordinary, strange, exceptional)
5
especial(adjective, separate, simple, superior, unusual)
5
exclusive(adjective, separate, simple, excellent, extraordinary)
5
good(adjective, great, pleasant, excellent, perfect)
5
irregular(adjective, excellent, extraordinary, unusual, strange)
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APASmart Define. (2016). rare thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/rare/thesaurus/synonyms
ChicagoSmart Define. 2016. "rare thesaurus" https://smartdefine.org/rare/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, rare thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/rare/thesaurus/synonyms>.
MLASmart Define. "rare thesaurus" 14 March 2016. Web. 29 September 2026. <https://smartdefine.org/rare/thesaurus/synonyms>