Synonyms and related words :
ancient history, ancient times, ancientness, and night, antiquity, day after day, distance of time, distant past, enduringly, for an age, for life, for long, hour after hour, interminably, long, long ago, long since, month after month, morning, noon, persistently, protractedly, remote age, since time began, the livelong day, till doomsday, undyingly, unendingly, year after year