72 entries under adjective topic. ×
| improbable(silly, impractical, unlikely, idealistic) | |
| invented(fantastic, imaginary, unlikely, unbelievable) | |
| ivory-tower(silly, impractical, unlikely, unreal) | |
| nonrealistic(silly, impractical, unlikely, unreal) | |
| not sensible(expression, silly, impractical, unlikely) | |
| out of this world(expression, idiom, fantastic, imaginary) | |
| phantasm(illusive, hallucinatory, phantasmal) | |
| silly(impractical, unlikely, unreal, idealistic) | |
| theoretical(silly, impractical, unlikely, idealistic) | |
| unbelievable(fantastic, imaginary, unlikely, whimsical) | |
| unlikely(fantastic, imaginary, unbelievable, idealistic) | |
| unworkable(silly, impractical, unlikely, unreal) |
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| APA | Smart Define. (2015). blue sky thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/blue_sky/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "blue sky thesaurus" https://smartdefine.org/blue_sky/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, blue sky thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/blue_sky/thesaurus/synonyms>. |
| MLA | Smart Define. "blue sky thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/blue_sky/thesaurus/synonyms> |