67 entries under fantastic topic. ×

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absurd(adjective, happy, perfect, extravagant)
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artistic(adjective, extravagant, inventive, creative)
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avant-garde(adjective, extravagant, inventive, creative)
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blue-sky(adjective, extravagant, inventive, creative)
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brain wave(expression, adjective, extravagant, inventive)
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breaking ground(expression, adjective, extravagant, inventive)
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castles in air(expression, adjective, idiom, understanding)
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dreamy(adjective, happy, perfect, extravagant)
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enterprising(adjective, extravagant, inventive, creative)
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far-fetched(adjective, imaginary, unlikely, unbelievable)
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fertile(adjective, extravagant, inventive, creative)
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high-flown(adjective, extravagant, inventive, creative)
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ingenious(adjective, extravagant, inventive, creative)
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inspired(adjective, extravagant, inventive, creative)
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invented(adjective, imaginary, unlikely, unbelievable)
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inventive(adjective, extravagant, creative)
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original(adjective, extravagant, inventive, creative)
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originative(adjective, extravagant, inventive, creative)
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out of this world(expression, adjective, idiom, imaginary)
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poetical(adjective, extravagant, inventive, creative)
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APASmart Define. (2016). pie in the sky thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/pie_in_the_sky/thesaurus/synonyms
ChicagoSmart Define. 2016. "pie in the sky thesaurus" https://smartdefine.org/pie_in_the_sky/thesaurus/synonyms (accessed October 2, 2026).
HarvardSmart Define 2016, pie in the sky thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/pie_in_the_sky/thesaurus/synonyms>.
MLASmart Define. "pie in the sky thesaurus" 25 February 2016. Web. 2 October 2026. <https://smartdefine.org/pie_in_the_sky/thesaurus/synonyms>