| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | not changing |
| Synonyms: | changeless, consistent, constant, fixed, immovable, immutable, inalterable, inflexible, monotonous, perpetual, regular, rigid, same, set, static, unalterable, unchangeable, unchanging, undiversified, unfailing, uniform, unmodifiable, unrelieved, unvarying, unwavering |
| Antonyms: | changeable, changing, variable, varying |
| Main Entry: | never-ending |
| Part of Speech: | adjective |
| Definition: | continual, unceasing |
| Synonyms: | amaranthine, boundless, ceaseless, constant, continuous, endless, eternal, everlasting, immortal, incessant, interminable, nonstop, perpetual, persistent, relentless, timeless, unbroken, unchanging, uninterrupted, unremitting |
| Antonyms: | ceasing, ending, halting, intermittent, interrupted |
| Main Entry: | old |
| Part of Speech: | adjective |
| Definition: | traditional, long-established |
| Synonyms: | age-old, constant, continuing, enduring, established, experienced, familiar, firm, hardened, inveterate, lifelong, long-lasting, long-lived, of long standing, perennial, perpetual, practiced, skilled, solid, staying, steady, time-honored, versed, veteran, vintage |
| Antonyms: | contemporary, current, modern, new |
| Main Entry: | permanent |
| Part of Speech: | adjective |
| Definition: | constant, lasting |
| Synonyms: | abiding, changeless, continual, diurnal, durable, enduring, everlasting, fixed, for keeps, forever, forever and a day, immutable, imperishable, in for the long haul, indestructible, invariable, long-lasting, perdurable, perduring, perennial, perpetual, persistent, set, set in concrete, set in stone, stable, steadfast, unchanging, unfading |
| Antonyms: | ephemeral, temporary |
| Main Entry: | persistent |
| Part of Speech: | adjective |
| Definition: | determined; continuous |
| Synonyms: | assiduous, bound, bound and determined, bulldogged, constant, continual, dogged, endless, enduring, firm, fixed, immovable, in for long haul, incessant, indefatigable, insistent, interminable, like bad penny, never-ending, obdurate, obstinate, perpetual, perseverant, persevering, persisting, pertinacious, relentless, repeated, resolute, steadfast, steady, sticky*, stubborn, tenacious, tireless, unflagging, unrelenting, unremitting, unshakable |
| Antonyms: | lazy, relenting, surrendering, yielding |
| Main Entry: | running |
| Part of Speech: | adjective |
| Definition: | continuous, flowing, operating |
| Synonyms: | active, alive, constant, cursive, dynamic, easy, effortless, executing, fluent, functioning, going, in action, in operation, in succession, incessant, live, moving, operative, perpetual, proceeding, producing, smooth, together, unbroken, unceasing, uninterrupted, working |
| Antonyms: | broken, discontinuous, intermittent, occasional |
| Main Entry: | same |
| Part of Speech: | adjective |
| Definition: | unchanging |
| Synonyms: | changeless, consistent, constant, invariable, perpetual, unaltered, unchanged, unfailing, uniform, unvarying |
| Antonyms: | changing, inconsistent, variable, wavering |
| Main Entry: | standing |
| Part of Speech: | adjective |
| Definition: | permanent |
| Synonyms: | continuing, existing, fixed, perpetual, regular, repeated |
| Antonyms: | fleeting, impermanent, temporary |
| Main Entry: | timeless |
| Part of Speech: | adjective |
| Definition: | eternal |
| Synonyms: | abiding, ageless, always, amaranthine, constant, continual, continued, dateless, deathless, endless, enduring, everlasting, forever, illimitable, immemorial, immortal, indefinite, infinite, lasting, never-ending, perennial, permanent, perpetual, persistent, undying, unending, without end |