- Definitions|1
- Thesaurus|686
- Abbreviations|0
60 entries under special topic. ×
| rare(adjective, extraordinary, unusual, strange, exceptional) | |
| exceptional(adjective, light, thin, extraordinary, unusual) | |
| unique(adjective, light, extraordinary, unusual, strange) | |
| fantastic(adjective, great, excellent, superb) | |
| singular(adjective, extraordinary, unusual, strange, exceptional) | |
| amazing(great, excellent, superb, exceptional) | |
| uncommon(adjective, light, thin, extraordinary, unusual) | |
| outstanding(great, excellent, superb, exceptional) | |
| remarkable(great, excellent, superb, exceptional) | |
| startling(great, excellent, unusual, superb) | |
| unheard-of(adjective, extraordinary, strange, exceptional, marvelous) | |
| unordinary(adjective, excellent, extraordinary, unusual, exceptional) | |
| unusual(adjective, light, excellent, thin, exceptional) | |
| extreme(adjective, unusual, immoral, shocking) | |
| prodigious(excellent, exceptional, brilliant, hidden) | |
| uncustomary(excellent, unusual, brilliant, rare) | |
| unwonted(light, thin, strange, exceptional, marvelous) | |
| bizarre(extraordinary, unusual, exceptional, marvelous) | |
| curious(extraordinary, unusual, exceptional, marvelous) | |
| egregious(unusual, rare) |
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| APA | Smart Define. (2015). unthinkable thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unthinkable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unthinkable thesaurus" https://smartdefine.org/unthinkable/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, unthinkable thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unthinkable/thesaurus/synonyms>. |
| MLA | Smart Define. "unthinkable thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/unthinkable/thesaurus/synonyms> |