eternity

infinity, infinitude, infiniteness; perpetuity; boundlessness.

time, duration; period, term, stage, space, span, spell, season; the whole time, the whole period; space-time; course; snap., intermediate time, while, interim, interval, pendency; intervention, intermission, intermittence, interregnum, interlude; respite., era, epoch; time of life, age, year, date; decade (period); moment, (instant) [more]., glass of time, sands of time, march of time, Father Time, ravages of time; arrow of time; river of time, whirligig of time, noiseless foot of time; scythe.

perpetuity, eternity, everness, aye, sempiternity, immortality, athanasia; interminability, agelessness, everlastingness; perpetuation; continued existence, uninterrupted existence; perennity; permanence (durability).