60 entries under special topic. ×

10
rare(adjective, extraordinary, unusual, strange, exceptional)
9
exceptional(adjective, light, thin, extraordinary, unusual)
9
unique(adjective, light, extraordinary, unusual, strange)
8
fantastic(adjective, great, excellent, superb)
7
singular(adjective, extraordinary, unusual, strange, exceptional)
6
amazing(great, excellent, superb, exceptional)
6
uncommon(adjective, light, thin, extraordinary, unusual)
4
outstanding(great, excellent, superb, exceptional)
4
remarkable(great, excellent, superb, exceptional)
4
startling(great, excellent, unusual, superb)
4
unheard-of(adjective, extraordinary, strange, exceptional, marvelous)
4
unordinary(adjective, excellent, extraordinary, unusual, exceptional)
3
unusual(adjective, light, excellent, thin, exceptional)
2
extreme(adjective, unusual, immoral, shocking)
2
prodigious(excellent, exceptional, brilliant, hidden)
2
uncustomary(excellent, unusual, brilliant, rare)
2
unwonted(light, thin, strange, exceptional, marvelous)
1
bizarre(extraordinary, unusual, exceptional, marvelous)
1
curious(extraordinary, unusual, exceptional, marvelous)
1
egregious(unusual, rare)
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APASmart Define. (2015). unthinkable thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unthinkable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unthinkable thesaurus" https://smartdefine.org/unthinkable/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, unthinkable thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unthinkable/thesaurus/synonyms>.
MLASmart Define. "unthinkable thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/unthinkable/thesaurus/synonyms>