| postulatory | |
| presumptive(adjective, supposition) | |
| primordial(adjective, obscure, extraordinary, superior, important) | |
| prophesied(adjective, suppositional) | |
| reputed(adjective, uncertain, doubtful, speculative, hypothetical) | |
| scholarly(adjective, academic) | |
| supernatural(adjective, excellent, obscure, extraordinary, superior) | |
| supposable | |
| suppositive(adjective, uncertain, doubtful, supposition, speculative) | |
| titular | |
| unapplied | |
| unsubstantiated(adjective, hypothetical) | |
| unusable(adjective, wild, unreasonable, useless, absurd) | |
| unworkable(adjective, wild, silly, unreasonable, useless) | |
| utopian(adjective, intellectual, abstract, unreal, unattainable) | |
| vague(adjective, hypothetical) | |
| absolute(excellent, obscure, extraordinary, superior, fantastic) | |
| abstractionist | |
| abstractive | |
| abstruse(intellectual, abstract, philosophical, nonconcrete) |
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| APA | Smart Define. (2015). theoretical thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/theoretical/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "theoretical thesaurus" https://smartdefine.org/theoretical/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, theoretical thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/theoretical/thesaurus/synonyms>. |
| MLA | Smart Define. "theoretical thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/theoretical/thesaurus/synonyms> |