| theoretical(adjective, fake, false, abstract, imaginary) |
| unapparent(adjective, unsubstantial, intangible) |
| unconcrete(adjective, unsubstantial) |
| visionary(fake, false, imaginary, fanciful, illusory) |
| weightless(adjective, unsubstantial) |
| wraithlike(adjective, heavenly, imperceptible, unseen, ghostly) |
| aerial(fake, false, heavenly, imaginary, fanciful) |
| apparitional(adjective, heavenly, unsubstantial, incorporeal, nonmaterial) |
| asomatous(heavenly, incorporeal, nonmaterial) |
| dim(adjective, unclear, insubstantial, indistinct, imperceptible) |
| discarnate(abstract, heavenly, theoretical, abstruse, philosophical) |
| false(fake, imaginary, fanciful, illusory, dreamlike) |
| fanciful(fake, false, imaginary, illusory, dreamlike) |
| fantastic(imaginary, illusory, dreamlike) |
| fleeting |
| furfuraceous |
| gritty(adjective, pulverulence) |
| hallucinatory(fake, false, imaginary, fanciful, illusory) |
| imagined(fake, false, hidden, imaginary, fanciful) |
| inapprehensible |