THESAURUS
spirit world
bodilessness, ghostliness, immateriality, immaterialness, impalpability, imponderability, incorporeality, incorporeity, inextension, intangibility, nonexteriority, occult phenomena, occultism, otherworldliness, psychical research, psychicism, psychics, psychism, shadowiness, spirituality, spirituousness, supernaturalism, the occult, unearthliness, unsubstantiality, unsubstantialness, unworldliness