4
illusory(adjective, light, weak, slight, fake)
4
imaginary(adjective, light, weak, slight, gentle)
4
imprecise(adjective, fine, vague, unknown, general)
4
infinitesimal
4
nonmaterial(abstract, heavenly, theoretical, religious, sacred)
4
rare(adjective, indefinite, obscured)
4
unapparent(adjective, indefinite, insubstantial, imperceptible, unseen)
4
unnoticeable(adjective, knowledge, imperceptible)
3
atomic
3
corpuscular
3
embryonic
3
fleeting
3
ghostly(adjective, heavenly, spiritual, imperceptible, unseen)
3
hypothetical(adjective, intellectual, abstract, indefinite, insubstantial)
3
indistinguishable(adjective, knowledge, hazy, indistinct, imperceptible)
3
phantom
3
spectral(adjective, heavenly, unsubstantial, incorporeal, nonmaterial)
3
theoretical(adjective, fake, false, intellectual, abstract)
3
unconcrete(adjective, unsubstantial)
3
unperceivable
11 years ago|9.4k views|share |citing 
APASmart Define. (2015). intangible thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/intangible/thesaurus/synonyms
ChicagoSmart Define. 2015. "intangible thesaurus" https://smartdefine.org/intangible/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, intangible thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/intangible/thesaurus/synonyms>.
MLASmart Define. "intangible thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/intangible/thesaurus/synonyms>