5
intellectual(adjective, thoughtful, abstract, theoretical, reflective)
5
philosophical(adjective, thought, thoughtful, vague, supernatural)
5
pure(adjective, vague, abstract, logical, theoretical)
5
reasoning(noun, thoughtful, pensive, reflective, cogitative)
5
theoretic(adjective, theoretical, thoughts)
5
unpractical(adjective, unreasonable, unviable)
5
unproved(adjective, new, trial, theoretical, untried)
5
unreliable(doubtful, vague, unsure, risky, hazardous)
5
untested(adjective, experiment)
4
analytical(adjective, theoretical)
4
conceptual(adjective, imaginary)
4
deliberative(adjective, thought, thoughts)
4
dreamy(adjective, gentle, marvelous, thoughtful, vague)
4
fantastic(adjective, excellent, gentle, marvelous, vague)
4
groundless
4
hypothetic
4
idealized(adjective, theoretical)
4
putative(adjective, uncertain, doubtful, vague, supposition)
4
questionable(doubtful, shaky, vague, unsure, imaginary)
4
suppositious(adjective, uncertain, doubtful, vague, supposition)
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APASmart Define. (2015). speculative thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/speculative/thesaurus/synonyms
ChicagoSmart Define. 2015. "speculative thesaurus" https://smartdefine.org/speculative/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, speculative thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/speculative/thesaurus/synonyms>.
MLASmart Define. "speculative thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/speculative/thesaurus/synonyms>