126 entries under extraordinary topic. ×

2
unsubstantial(adjective, fine, thin, strange)
2
weak(poor, strange, doubtful, dubious)
2
wicked(adjective, good, cool, great, pleasant)
1
individual(adjective, separate, simple, superior)
1
alone(adjective, separate, simple, unusual)
1
belief(strange, unbelievable, implausible, unthinkable)
1
beyond reason(expression, strange, unbelievable, implausible)
1
certain(adjective, superior, unusual, exceptional)
1
definite(adjective, superior, unusual, certain)
1
eventful(adjective, great, unusual, famous)
1
gilt-edged(cool, great, solid, exceptional)
1
greatest(adjective, good, great, excellent, solid)
1
imcomprehensible(strange, unbelievable, implausible, unthinkable)
1
implausible(strange, doubtful, dubious, unlikely)
1
impossible(strange, unbelievable, implausible, unthinkable)
1
impressive(adjective, unusual, superb, wonderful)
1
incogitable(strange, unbelievable, implausible, unthinkable)
1
insupposable(strange, unbelievable, implausible, unthinkable)
1
mind-boggling(adjective, strange, unbelievable, implausible)
1
momentous(adjective, great, solid, superior)
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APASmart Define. (2016). rare thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/rare/thesaurus/synonyms
ChicagoSmart Define. 2016. "rare thesaurus" https://smartdefine.org/rare/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, rare thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/rare/thesaurus/synonyms>.
MLASmart Define. "rare thesaurus" 14 March 2016. Web. 30 September 2026. <https://smartdefine.org/rare/thesaurus/synonyms>