perdurable Synonyms

indestructible durable undestroyable perduring perpetual permanent perennial longsome long-lived longevous longeval lifelong lasting infinite inextinguishable persisting persistent prolonged long-standing long-term long-lasting unfading never-ending unending unceasing undying timeless standing stable sempiternal ineradicable indissoluble endless durative diuturnal deathless dateless continuous continuing continuate continual constant chronic ageless enduring eternal everlasting indelible indefinite indefeasible