(n.) The state or quality of being immaterial; immateriality.

airiness airy nothing bodilessness ethereality fineness flimsiness ghostliness immateriality immaterialness impalpability imponderability incorporeity inextension insolidity insubstantiality intangibility mistiness nonexteriority occult phenomena occultism otherworldliness psychical research psychicism psychics psychism rareness rarity shadowiness slightness spirit world spirituality spirituousness subtility subtilty subtlety supernaturalism tenuity tenuousness the occult thinness unconcreteness unearthliness unreality unsolidity unsubstantiality unsubstantialness unworldliness vagueness