80 entries under adjective topic. ×

6
indiscernible(knowledge, unsubstantial, intangible)
6
insensible(knowledge, heavenly, subtle, imperceptible)
6
nonphysical(abstract, heavenly, theoretical, immaterial)
6
tenuous(unsubstantial, intangible)
6
unobservable(knowledge, imperceptible, unsubstantial, intangible)
5
abstract(insubstantial, theoretical, imperceptible, immaterial)
5
chimerical(fake, false, imaginary, fanciful)
5
disembodied(heavenly, unsubstantial, incorporeal, nonmaterial)
5
illusory(fake, false, imaginary, fanciful)
5
imaginary(fake, false, hidden, fanciful)
5
supernatural(abstract, heavenly, theoretical, imperceptible)
5
thin(light, fine, small, loose)
5
unearthly(abstract, heavenly, theoretical, immaterial)
5
unworldly(heavenly, immaterial, ghostly, incorporeal)
4
efflorescent
4
evanescent
4
ghostly(heavenly, indistinguishable, imperceptible, unseen)
4
imprecise(unclear, indistinct, indistinguishable, unsubstantial)
4
indistinct(unclear, subtle, imperceptible, unremarkable)
4
phantom
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APASmart Define. (2015). impalpable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/impalpable/thesaurus/synonyms
ChicagoSmart Define. 2015. "impalpable thesaurus" https://smartdefine.org/impalpable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, impalpable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/impalpable/thesaurus/synonyms>.
MLASmart Define. "impalpable thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/impalpable/thesaurus/synonyms>