4
unfrequent(adjective, exceptional, infrequent, infrequency)
4
unorthodox(adjective, unusual, strange, usual, special)
4
wispy(adjective, wispy)
4
wondrous(adjective, extraordinary, remarkable, impressive)
3
aberrant(adjective, excellent, unusual, strange, special)
3
airy(adjective, delicate, ethereal)
3
at a premium(expression, adjective, idiom, inadequate, insufficient)
3
beautiful(adjective, cool, great, pleasant, bright)
3
best(adjective, excellent, superior, unusual, exceptional)
3
cool(adjective, good, great, pleasant, excellent)
3
delectable(adjective, moist, weak, soft, pleasant)
3
diluted
3
distinct(adjective, separate, simple, excellent, extraordinary)
3
distinctive(adjective, moist, pleasant, superior, sweet)
3
exceeding
3
far-fetched(doubtful, unlikely, implausible)
3
idiosyncratic(adjective, odd, bizarre, outlandish)
3
inimitable(adjective, unusual, special, single, unique)
3
invaluable(adjective, excellent, exceptional, valuable, scarce)
3
lone(adjective, separate, simple, exceptional, special)
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APASmart Define. (2016). rare thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/rare/thesaurus/synonyms
ChicagoSmart Define. 2016. "rare thesaurus" https://smartdefine.org/rare/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, rare thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/rare/thesaurus/synonyms>.
MLASmart Define. "rare thesaurus" 14 March 2016. Web. 26 September 2026. <https://smartdefine.org/rare/thesaurus/synonyms>