(a.) Equally eternal.

accompanying ageless agreeing ceaseless coetaneous coeval coexistent coexisting coinstantaneous collateral concomitant concurrent constant contemporaneous contemporary conterminous continual continuous coterminous dateless endless eternal eterne ever-being ever-durable ever-during everlasting everliving immemorial incessant indestructible infinite interminable isochronal isochronous never-ceasing never-ending nonstop nonterminating nonterminous olamic perdurable permanent perpetual sempiternal simultaneous steady timeless unceasing unending unintermitting uninterrupted unison unisonous unremitting without end