undying Synonyms

deathless long-term long-lived lasting irrepressible interminable infinite inextirpable inextinguishable ineradicable indissolvable indissoluble indestructible indesinent perdurable perennial permanent long-lasting unfading unchanging never-ending unending unceasing unremitting unfailing timeless sempiternal persistent perpetual indelible indeciduous endless durable dateless continuous continuing continual constant changeless ceaseless boundless amaranthine ageless enduring eternal everduring incorruptible incessant imperishable immutable