81 entries under abstract topic. ×
| extravagant(adjective, intellectual, unreal, unattainable) | |
| high-flown(adjective, intellectual, supernatural, spiritual) | |
| illogical(wild, unreasonable, useless, absurd) | |
| impossible(wild, silly, unreasonable, useless, absurd) | |
| improbable(wild, silly, unreasonable, useless, absurd) | |
| inapplicable(wild, unreasonable, useless, absurd) | |
| inefficacious(wild, unreasonable, useless, absurd) | |
| inoperable(wild, unreasonable, useless, absurd) | |
| insubstantial(fake, false, imaginary, fanciful) | |
| ivory-tower(adjective, wild, unreasonable, useless, intellectual) | |
| jesuitic(abstruse, philosophical) | |
| mercurial(adjective, intellectual, unreal, unattainable) | |
| mystical(abstruse, philosophical) | |
| nonfunctional(wild, unreasonable, useless, absurd) | |
| nonmaterial(abstruse, philosophical) | |
| nonphysical(abstruse, philosophical) | |
| nonviable(wild, unreasonable, useless, absurd) | |
| numinous(abstruse, philosophical) | |
| otherworldly(obscure, extraordinary, superior, wild, absurd) | |
| out-of-reach(adjective, intellectual, unreal, unattainable) |
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| APA | Smart Define. (2015). theoretical thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/theoretical/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "theoretical thesaurus" https://smartdefine.org/theoretical/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, theoretical thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/theoretical/thesaurus/synonyms>. |
| MLA | Smart Define. "theoretical thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/theoretical/thesaurus/synonyms> |