List of unknown synonyms and unknown related words.
Heaven, Paradise, a better place, able, abstruse, afterlife, afterworld, anonymous, beclouded, blind, buried, close, clouded, concealed, covered, covert, cryptonymic, cryptonymous, dark, dark horse, destiny, eclipsed, enigma, enigmatic, eternal home, fate, frontier, frontiers of knowledge, future state, hid, hidden, home, humble, ignotus, in a cloud, in a fog, in eclipse, in purdah, in the wings, incalculable, incognito, incognizable, incommunicado, inglorious, innominate, latent, life after death, life to come, little known, matter of ignorance, mysterious, mystery, n, nameless, next world, no credit to, obfuscated, obscure, obscured, occult, otherworld, postexistence, puzzle, puzzling, recondite, renownless, riddle, sealed, sealed book, secluded, secluse, secret, sequestered, strange, terra incognita, the beyond, the good hereafter, the grave, the great beyond, the great hereafter, the hereafter, the incalculable, the strange, the unfamiliar, the unknowable, the unknown, unacknowledged, unapparent, unapprehended, unascertained, unbeknown, uncelebrated, uncharted, unclassified, undefined, under an eclipse, under cover, under house arrest, under wraps, underground, undesignated, undisclosed, undiscoverable, undiscovered, undistinguished, undivulged, unexplained, unexplored, unexplored ground, unexplored territory, unexposed, unfamed, unfamiliar, unfathomed, unglorified, unheard, unheard-of, unhonored, unidentified, uninvestigated, unknowable, unknown quantity, unnamed, unnotable, unnoted, unnoticed, unperceived, unplumbed, unpopular, unrecognized, unremarked, unrenowned, unrevealed, unspecified, unsung, unsuspected, untold, untouched, virgin, what bodes, what is fated, without a name, world to come, wrapped in clouds, x, z