20 entries under improbable topic. ×

1
floating(adjective, happy, perfect, silly, fantastic)
1
gone(adjective, silly, impractical, unlikely, unreal)
1
nonsensical(adjective, silly, impractical, unlikely, unreal)
1
on cloud nine(expression, adjective, idiom, happy, perfect)
1
reachy(adjective, silly, impractical, unlikely, unreal)
1
romantic(adjective, happy, perfect, silly, fantastic)
1
unreal(adjective, happy, perfect, false, silly)
1
unrealistic(adjective, happy, practical, fortunate, unlikely)
0
half-baked(adjective, silly, impractical, unlikely, unreal)
0
idealistic(happy, fortunate, unlikely, storybook)
0
impossible(adjective, silly, impractical, unlikely, idealistic)
0
impracticable(adjective, silly, impractical, unlikely, unreal)
0
impractical(adjective, happy, silly, fortunate, unlikely)
0
ivory-tower(adjective, silly, impractical, unlikely, unreal)
0
naive(unlikely, idealistic)
0
nonrealistic(adjective, silly, impractical, unlikely, unreal)
0
silly(adjective, impractical, unlikely, unreal, idealistic)
0
theoretical(adjective, silly, impractical, unlikely, idealistic)
0
unlikely(adjective, fantastic, imaginary, unbelievable, idealistic)
0
unworkable(adjective, silly, impractical, unlikely, unreal)
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APASmart Define. (2015). blue sky thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/blue_sky/thesaurus/synonyms
ChicagoSmart Define. 2015. "blue sky thesaurus" https://smartdefine.org/blue_sky/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, blue sky thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/blue_sky/thesaurus/synonyms>.
MLASmart Define. "blue sky thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/blue_sky/thesaurus/synonyms>