| immaterial(adjective, form, light, weak, slight) |
| impalpable(adjective, knowledge, abstract, heavenly, indefinite) |
| incorporeal(adjective, abstract, heavenly, indefinite, theoretical) |
| unsubstantial(adjective, gentle, abstract, heavenly, indefinite) |
| airy(adjective, light, weak, delicate, heavenly) |
| imperceptible(adjective, knowledge, slight, fine, subtle) |
| nonphysical(adjective, abstract, heavenly, theoretical, immaterial) |
| ethereal(adjective, delicate, heavenly, indefinite, imperceptible) |
| elusive(adjective, vague, mysterious, subtle, indefinite) |
| unreal(adjective, gentle, fake, abstract, indefinite) |
| indefinite(adjective, vague, intellectual, unknown, abstract) |
| insubstantial(adjective, light, weak, slight, fake) |
| imponderable(adjective, light, knowledge, heavenly, indefinite) |
| invisible(adjective, knowledge, hidden, indefinite, unable) |
| spiritual(adjective, abstract, heavenly, theoretical, religious) |
| abstract(adjective, intellectual, supernatural, indefinite, spiritual) |
| vague(adjective, slight, excellent, gentle, fine) |
| inappreciable(adjective, knowledge, indefinite, imperceptible, littleness) |
| shadowy(adjective, excellent, gentle, fine, marvelous) |
| insensible(adjective, knowledge, heavenly, indefinite, imperceptible) |