permanent

permanent adjective abiding, ageless, ceaseless, changeless, chronic, confirmed, constant, continued, dateless, deep-seated, durable, endless, enduring, entrenched, established, eternal, everlasting, fast, fixed, immortal, immutable, imperishable, incommutable, indefeasible, indelible, indestructible, ineradicable, inextinguishable, infinite, ingrained, insusceptible to change, interminable, intransient, intransmutable, invulnerable, irreversible, irrevocable, lasting, long-lasting, never-ending, nonreversible, perdurable, perduring, perennial, perpetual, persevering, persistent, persisting, preserved, remaining, reverseless, rooted, secure, sempiternal, set, stabilis, stable, static, stationary, staying, steadfast, steady, surviving, sustained, tenacious, unalterable, unceasing, unchangeable, unchanging, unchecked, undestroyable, unending, unerasable, unfading, unfailing, unflagging, uninterrupted, unmodifiable, unmovable, unrepealable, unshifting, unvarying, unwavering, unyielding, without end

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See also: chronic, constant, continual, conventional, durable, final, fixed, immutable, indefeasible, indelible, indestructible, infinite, ingrained, irreversible, irrevocable, last, noncancellable, perpetual, stable, standing, static, unalterable