n. 25B6; adjective ENDURING, long-lasting, long-lived, abiding, continuing, long-term, surviving, persisting, permanent; durable, constant, stable, established, secure, long-standing; unchanging, irreversible, immutable, eternal, undying, everlasting, unending, never-ending, unfading, changeless, indestructible, unceasing, unwavering, unfaltering.
ephemeral.