perpetual Synonyms

constant everlasting incessant eternal unceasing continual unending endless ceaseless timeless durable permanent lasting never-ending ongoing continuous immortal without end uninterrupted unremitting ageless unbroken undying sustained termless undestroyable unbounded undated sumless steady regular reiterative relentless repeated repeating recurring running seamless sempiternal shoreless stable standing sound stationary staying steadfast recurrent unfailing unnumbered long-term