perpetual Synonyms

everlasting constant incessant unceasing eternal ageless ceaseless unending never-ending unremitting continual endless steady protractile sumless sustained termless timeless unbroken undated undestroyable undying steadfast staying quiescent recurring recurrent regular reiterative relentless repeated running seamless sempiternal shoreless sound stable standing stationary unfailing unnumbered long-standing stabile nonfinite nonspatial unchanged age-long non-stop open-ended unabated