unending Synonyms

everlasting eternal eonian unceasing perpetual ageless aeonian undying unrelenting unbroken unbounded timeless termless steady perennial permanent persisting persistent relentless renewable sempiternal sesquipedalian perdurable unremitting uninterrupted unrelieved non-stop neverending immeasurate nonfinite long-term long-lasting run on unfading nonstop round the clock around the clock unchanging never-ending agelong without end ongoing measureless enduring endless deathless dateless cyclical continuous continuing