THESAURUS
intangibility
airiness, bodilessness, ethereality, evanescence, flimsiness, ghostliness, immateriality, immaterialness, impalpability, imperceptibility, imponderability, incorporeality, incorporeity, inextension, insubstantiality, invisibility, mistiness, nonexteriority, occult phenomena, occultism, otherworldliness, psychical research, psychicism, psychics, psychism, shadowiness, spirit world, spirituality, spirituousness, subtility, subtlety, supernaturalism, tenuity, tenuousness, the occult, unconcreteness, unearthliness, unreality, unsolidity, unsubstantiality, unsubstantialness, unworldliness, vagueness