46 entries under unbelievable topic. ×
| poetic(adjective, fantastic, extravagant, absurd, romantic) | |
| preposterous(adjective, fantastic, extravagant, absurd, romantic) | |
| suppositious(adjective, fake, false, fantastic, extravagant) | |
| unlikely(adjective, fantastic, imaginary, whimsical) | |
| castles in the air(expression, adjective, idiom, fantastic, extravagant) | |
| out of this world(expression, adjective, idiom, superb, wonderful) |
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| APA | Smart Define. (2016). legendary thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/legendary/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "legendary thesaurus" https://smartdefine.org/legendary/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2016, legendary thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/legendary/thesaurus/synonyms>. |
| MLA | Smart Define. "legendary thesaurus" 29 March 2016. Web. 1 October 2026. <https://smartdefine.org/legendary/thesaurus/synonyms> |