122 entries under adjective topic. ×

4
illusory(light, weak, slight, fake)
4
imaginary(light, weak, slight, gentle)
4
imprecise(fine, vague, unknown, general)
4
rare(indefinite, obscured)
4
unapparent(indefinite, insubstantial, imperceptible, unseen)
4
unnoticeable(knowledge, imperceptible)
3
fleeting
3
ghostly(heavenly, spiritual, imperceptible, unseen)
3
hypothetical(intellectual, abstract, indefinite, insubstantial)
3
indistinguishable(knowledge, hazy, indistinct, imperceptible)
3
phantom
3
spectral(heavenly, unsubstantial, incorporeal, nonmaterial)
3
theoretical(fake, false, intellectual, abstract)
3
unconcrete
3
unperceivable
3
weightless
2
abstruse(intellectual, abstract, indefinite, insubstantial)
2
apparitional(heavenly, unsubstantial, incorporeal, nonmaterial)
2
eluding(indefinite, obscured)
2
ideal(fake, false, fantastic, intellectual)
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APASmart Define. (2015). intangible thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/intangible/thesaurus/synonyms
ChicagoSmart Define. 2015. "intangible thesaurus" https://smartdefine.org/intangible/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, intangible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/intangible/thesaurus/synonyms>.
MLASmart Define. "intangible thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/intangible/thesaurus/synonyms>