32 entries under imperceptible topic. ×

12
ethereal(adjective, delicate, heavenly, indefinite)
12
unreal(adjective, gentle, fake, abstract, indefinite)
10
imponderable(adjective, light, knowledge, heavenly, indefinite)
9
vague(adjective, slight, excellent, gentle, fine)
8
inappreciable(adjective, knowledge, indefinite, littleness)
8
shadowy(adjective, excellent, gentle, fine, marvelous)
7
insensible(adjective, knowledge, heavenly, indefinite)
6
unobservable(adjective, knowledge, indefinite, obscured)
6
vaporous(adjective, insensible, inconspicuous, ethereal)
5
dim(adjective, indefinite, hazy, insubstantial, indistinct)
5
obscure(adjective, vague, unknown, general, subtle)
5
slight(adjective, light, weak, fine, thin)
5
supernatural(adjective, abstract, heavenly, theoretical)
5
tenuous(adjective, light, weak, slight, fine)
4
unapparent(adjective, indefinite, insubstantial, unseen)
4
unnoticeable(adjective, knowledge)
3
ghostly(adjective, heavenly, spiritual, unseen)
3
hypothetical(adjective, intellectual, abstract, indefinite, insubstantial)
3
indistinguishable(adjective, knowledge, hazy, indistinct)
2
abstruse(adjective, intellectual, abstract, indefinite, insubstantial)
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APASmart Define. (2015). intangible thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/intangible/thesaurus/synonyms
ChicagoSmart Define. 2015. "intangible thesaurus" https://smartdefine.org/intangible/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, intangible thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/intangible/thesaurus/synonyms>.
MLASmart Define. "intangible thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/intangible/thesaurus/synonyms>