(n.) The quality or state of being intangible; intangibleness.

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