10 entries under knowledge topic. ×

11
impalpable(adjective, heavenly, subtle, imperceptible)
10
intangible(adjective, light, heavenly, indefinite)
6
imperceptible(adjective, hard, faint)
6
insensible(adjective, heavenly, subtle, imperceptible)
6
invisible(adjective, hidden, unable, imperceptible)
5
inappreciable(adjective, imperceptible)
5
unobservable(adjective, imperceptible)
4
indiscernible(adjective, imperceptible)
3
unnoticeable(adjective, imperceptible)
2
indistinguishable(adjective, imperceptible)
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APASmart Define. (2015). imponderable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/imponderable/thesaurus/synonyms
ChicagoSmart Define. 2015. "imponderable thesaurus" https://smartdefine.org/imponderable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, imponderable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/imponderable/thesaurus/synonyms>.
MLASmart Define. "imponderable thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/imponderable/thesaurus/synonyms>