What is another word for "forgotten"?

Roget's Thesaurus (1911) lists these synonyms for "forgotten": being, bygone, clean, failing, fault, fiend, for, forget, forgetful, forgot, gift, gone, gratitude, head, heedless, horse, ill, ingrate, ingratitude, insensible, look, memory, mind, mindless, mouth, non, nothing, oblivion, oblivious, office, one, out, past, recollection, sunk, task, thank, thankless, the, thou.