4
visionary(excellent, gentle, fake, thin, false)
4
wraithlike(adjective, form, heavenly, airy, insensible)
3
abstract(adjective, rational, intellectual, supernatural, spiritual)
3
dreamy(adjective, form, gentle, negative, heavenly)
3
ephemeral(light, weak, slight, imaginary, flimsy)
3
external(adjective, extraneous)
3
neither here nor there(expression, adjective, idiom, adverb, unimportant)
3
of no account(expression, adjective, idiom, mean, slight)
3
of no consequence(expression, adjective, idiom, slight, lower)
3
of no importance(expression, adjective, idiom, insignificant, unimportant)
3
parenthetical(adjective, extraneous)
3
phantasmal(adjective, unsubstantial)
3
secondary(adjective, dull, weak, lower, inferior)
3
tenuous(adjective, light, weak, slight, thin)
3
theoretical(adjective, fake, false, intellectual, abstract)
3
unconcrete(adjective, unsubstantial)
3
unnecessary(adjective, slight, lower, value, inferior)
3
weightless(adjective, unsubstantial)
2
apathetic
2
astral(excellent, gentle, marvelous, vague, dreamy)
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APASmart Define. (2015). immaterial thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/immaterial/thesaurus/synonyms
ChicagoSmart Define. 2015. "immaterial thesaurus" https://smartdefine.org/immaterial/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, immaterial thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/immaterial/thesaurus/synonyms>.
MLASmart Define. "immaterial thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/immaterial/thesaurus/synonyms>