4
infrequent(adjective, excellent, unusual, special, brilliant)
4
innovative(adjective, new, fundamental, novel, unique)
4
modern(adjective, exceptional, original)
4
newfangled(adjective, new, exceptional, original, unconformity)
4
queer(adjective, extraordinary, unusual, special, remarkable)
4
scarce(excellent, unusual, special, brilliant, rare)
4
sensational(adjective, exceptional)
4
striking(adjective, exceptional)
4
unconventional(adjective, unusual, strange, new, fresh)
4
unorthodox(adjective, unusual, strange, new, special)
4
unrivaled(noun, adjective, new, exceptional, original)
4
unwonted(adjective, extraordinary, unusual, strange, new)
3
amazing
3
atypical(adjective, excellent, extraordinary, special, brilliant)
3
creative(adjective, rational, fantastic, original, resourceful)
3
different(adjective, new)
3
excellent(adjective, exceptional)
3
idiosyncratic(adjective, exceptional, original)
3
incomparable(excellent, unusual, special, brilliant, rare)
3
inconceivable
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APASmart Define. (2016). unprecedented thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unprecedented/thesaurus/synonyms
ChicagoSmart Define. 2016. "unprecedented thesaurus" https://smartdefine.org/unprecedented/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, unprecedented thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unprecedented/thesaurus/synonyms>.
MLASmart Define. "unprecedented thesaurus" 15 January 2016. Web. 25 September 2026. <https://smartdefine.org/unprecedented/thesaurus/synonyms>