| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | continuing or existing for an indefinite time |
| Synonyms: | constant, continuing, enduring, eternal, everlasting, fast, indissoluble, lasting, permanent, perpetual, persistent, persisting, steadfast, steady |
| Antonyms: | ephemeral, fleeting, transient |
| Main Entry: | constant |
| Part of Speech: | adjective |
| Definition: | neverending |
| Synonyms: | abiding, ceaseless, chronic, continual, continuous, endless, enduring, eternal, everlasting, incessant, interminable, lasting, nonstop, perpetual, persistent, persisting, relentless, sustained, unending, uninterrupted, unrelenting, unremitting |
| Antonyms: | concluding, ending, interrupted, stopping, terminable, terminating |
| Main Entry: | durable |
| Part of Speech: | adjective |
| Definition: | sturdy, long-lasting |
| Synonyms: | abiding, constant, dependable, diuturnal, enduring, fast, firm, fixed, impervious, lasting, long-continued, perdurable, perduring, permanent, persistent, reliable, resistant, sound, stable, stout, strong, substantial, tenacious, tough |
| Antonyms: | fragile, impermanent, poorly made, temporary, undependable, unsturdy, weak |
| Main Entry: | eternal |
| Part of Speech: | adjective |
| Definition: | without pause; endless |
| Synonyms: | abiding, ageless, always, amaranthine, boundless, ceaseless, constant, continual, continued, continuous, dateless, deathless, enduring, everlasting, forever, illimitable, immemorial, immortal, immutable, imperishable, incessant, indefinite, indestructible, infinite, interminable, lasting, never-ending, perdurable, perennial, permanent, perpetual, persistent, relentless, termless, timeless, unbroken, unceasing, undying, unending, unfading, uninterrupted, unremitting, without end |
| Antonyms: | brief, changeable, changing, ending, ephemeral, stopping, temporary, terminable, transient |
| Main Entry: | everlasting |
| Part of Speech: | adjective |
| Definition: | infinite, never-ending |
| Synonyms: | abiding, amaranthine, boundless, ceaseless, constant, continual, continuous, deathless, endless, eternal, immortal, imperishable, incessant, indestructible, interminable, lasting, limitless, perdurable, permanent, perpetual, termless, timeless, unceasing, undying, unending, uninterrupted, unremitting |
| Antonyms: | ceasing, concluding, ending, temporary, terminating, transient |
| Main Entry: | firm |
| Part of Speech: | adjective |
| Definition: | unalterable, definite |
| Synonyms: | abiding, adamant, bent, bound, consistent, constant, dead set on, determined, enduring, established, exact, explicit, fixed, flat, going, hang tough, inflexible, intent, never-failing, obdurate, persevering, persistent, prevailing, resolute, resolved, set, settled, specific, stable, stand pat, stated, staunch, steadfast, steady, stipulated, strict, strong, sure, tenacious, true, unbending, unchangeable, undeviating, unflinching, unqualified, unshakable, unshaken, unwavering, unyielding |
| Antonyms: | alterable, changeable, indefinite, irresolute |
| Main Entry: | fixed |
| Part of Speech: | adjective |
| Definition: | intent, resolute; established |
| Synonyms: | abiding, agreed, arranged, certain, changeless, circumscribed, confirmed, decided, defined, definite, definitive, determinate, enduring, firm, in the bag, inalterable, inflexible, inveterate, level, limited, narrow, never-failing, planned, prearranged, precise, resolved, restricted, rigged, rooted, set, set-up, settled, stated, steadfast, steady, still, stipulated, sure, unbending, unblinking, unchangeable, undeviating, unfaltering, unflinching, unmodifiable, unmovable, unqualified, unwavering |
| Antonyms: | indefinite, irresolute, unestablished, unfixed, variable |
| Main Entry: | immortal |
| Part of Speech: | adjective |
| Definition: | death-defying, imperishable |
| Synonyms: | abiding, amaranthine, ceaseless, constant, deathless, endless, enduring, eternal, evergreen, everlasting, incorruptible, indestructible, indissoluble, interminable, lasting, never-ceasing, never-ending, perdurable, perennial, permanent, perpetual, phoenixlike, sempiternal, timeless, undying, unfading |
| Notes: | immortal means not subject to death, while immoral means violating principles of right and wrong or not adhering to ethical or moral principles |
| Antonyms: | destructible, ephemeral, human, mortal, perishable |
| Main Entry: | immutable |
| Part of Speech: | adjective |
| Definition: | unchangeable |
| Synonyms: | abiding, ageless, changeless, constant, enduring, fixed, immovable, inflexible, invariable, permanent, perpetual, sacrosanct, stable, steadfast, unalterable, unmodifiable |
| Antonyms: | alterable, changeable, flexible, mutable, variable |