1. ABSOLUTE TIME
[Endless duration] Perpetuity.
[Nouns] perpetuity, eternity, everness, aye, sempiternity, immortality, athanasia; interminability, agelessness, everlastingness; perpetuation; continued existence, uninterrupted existence; perennity; permanence (durability) [more].
[Adjectives] perpetual, eternal; everduring, everlasting, everliving, everflowing; continual, sempiternal; coeternal; endless, unending; ceaseless, incessant, uninterrupted, indesinent, unceasing; endless, unending, interminable, having no end; unfading, evergreen, amaranthine; neverending, never-dying, never-fading; deathless, immortal, undying, imperishable.
[Adverbs] perpetually; always, ever, evermore, aye; forever, for aye, till the end of the universe, forevermore, forever and a day, forever and ever; in all ages, from age to age; without end; world without end, time without end; in secula seculorum; to the end of time, to the crack of doom, to the "last syllable of recorded time" [Macbeth]; till doomsday; constantly (very frequently) [more].
[Phrases] esto perpetuum; labitur et labetur in omne volubilis oevum [Horace]; "but thou shall flourish in immortal youth" [Addison]; "Eternity! thou pleasing, dreadful thought" [Addison]; "her immortal part with angels lives" [Romeo & Juliet]; ohne Rast [Goethe's motto "without rest" (German)]; ora e sempre ["now and forever" (Italian)].