77 entries under theoretical topic. ×

6
uncertain(verb, adjective, doubtful, dubious, likely)
5
reputed(adjective, uncertain, doubtful, supposed)
5
suspect(verb, adjective, uncertain, doubtful, dubious)
5
unreal(adjective, negative, intellectual, supernatural, abstract)
4
transcendental(adjective, great, superior, real, intellectual)
3
fantastic(adjective, excellent, obscure, extraordinary, superior)
3
intangible(adjective, intellectual, abstract, indefinite, insubstantial)
3
made-up(fantastic, unreal, fictitious, invented)
3
unpractical
2
abstruse(intellectual, abstract, insubstantial, imperceptible)
2
contestable(adjective, imaginary, supposed, assumed)
2
estimated(supposed, speculative, alleged, presumed)
2
insubstantial(negative, abstract, imperceptible, vacant)
2
philosophical(intellectual, abstract, academic, notional)
2
postulated(adjective, expected, imaginary, supposed)
2
presupposed(adjective, expected, imaginary, apparent)
2
refutable(adjective, imaginary, supposed, assumed)
2
unconfirmed(adjective, uncertain, doubtful, dubious, imaginary)
1
conjecturable(adjective, imaginary, supposed, assumed)
1
fictional(negative, fantastic, unreal, fictitious)
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APASmart Define. (2015). hypothetical thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hypothetical/thesaurus/synonyms
ChicagoSmart Define. 2015. "hypothetical thesaurus" https://smartdefine.org/hypothetical/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, hypothetical thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hypothetical/thesaurus/synonyms>.
MLASmart Define. "hypothetical thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/hypothetical/thesaurus/synonyms>