Eidetic, Endless, Enduring, Eternal, Evergreen, Everlasting, Extended, Faithful, Fibrous, Firm, Fixed, Fresh, Frozen, Green, Hard, Hardy, Heavy, Immobile, Immutable, Incessant, Indefatigable, Indefeasible, Indelible, Indissoluble, Indomitable, Industrious, Inert, Insistent, Intact, Interminable, Invariable, Inveterate, Invincible, Inviolate, Irretrievable, Irreversible, Irrevocable, Languishing, Leathery, Lengthened, Lingering, Long, Loyal, Macrobiotic, Marathon, Massive, Noble, Obstinate, Old, Overlong, Patient, Perennial, Permanent, Perpetual, Persevering, Persistent, Persisting, Pertinacious, Plodding, Plugging, Preoccupied, Prolonged, Protracted, Quiescent, Rapt, Recalled, Recollected, Relentless, Remaining, Remembered, Abiding, Aged, Alive, Ancient, Antique, Assiduous, Bulky, Changeless, Chewy, Chronic, Chronological, Cohesive, Constant, Continual, Continuing, Continuous, Dense, Diligent, Dogged, Durable, Resistant, Resolute, Retained, Rigid, Rugged, Sinewy, Sleepless, Slogging, Solid, Sound, Stable, Static, Stationary, Staying, Steadfast, Steady, Stiff, Stout, Stringy, Strong, Stubborn, Sturdy, Sustained, Temporal, Tenacious, Tireless, Torpid, Tough, Unalterable, Unaltered, Unceasing, Unchangeable, Unchanged, Unchanging, Unchecked, Unconquerable, Undaunted, Undying, Unfailing, Unflagging, Unflinching, Uninterrupted, Unmodifiable, Unrelenting, Unremitting, Unswerving, Untiring, Unvarying, Unwavering, Unwearied, Unyielding, Vigorous, Vital, Vivid, Wiry