| 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: | fast |
| Part of Speech: | adjective |
| Definition: | fixed, immovable |
Synonyms: |
adherent, ardent, attached, close, constant, constrained, durable, faithful, fastened, firm, fortified, glued, held, impregnable, indelible, inextricable, lasting, loyal, permanent, resistant, resolute, secure, set, sound, stable, staunch, steadfast, stuck, sure, tenacious, tight, true, true blue, unwavering, wedged |
Antonyms: |
flexible, impermanent, insecure, loose, movable, unattached, unfixed |
| Main Entry: | firm |
| Part of Speech: | adjective |
| Definition: | stable, unmoving |
Synonyms: |
anchored, bolted, braced, cemented, closed, durable, embedded, fast, fastened, fixed, immobile, immovable, motionless, mounted, nailed, petrified, riveted, robust, rooted, screwed, secure, secured, set, settled, soldered, solid, sound, spiked, stationary, steady, strong, sturdy, substantial, taut, tenacious, tight, tightened, unfluctuating, unshakable, welded |
Antonyms: |
moving, unsettled, unstable, wavering |
| Main Entry: | indestructible |
| Part of Speech: | adjective |
| Definition: | lasting, unable to be destroyed |
Synonyms: |
abiding, deathless, durable, enduring, everlasting, immortal, immutable, imperishable, incorruptible, indelible, indissoluble, inexterminable, inextinguishable, inextirpable, irrefragable, irrefrangible, nonperishable, permanent, perpetual, unalterable, unbreakable, unchangeable, undestroyable, undying, unfading |
Antonyms: |
breakable, destructible, perishable |
| Main Entry: | lasting |
| Part of Speech: | adjective |
| Definition: | enduring, unending |
Synonyms: |
abiding, constant, continual, continuing, deep-rooted, durable, endless, eternal, everlasting, forever, in for the long haul, incessant, indelible, indissoluble, inexhaustible, inexpungible, lifelong, long-term, longstanding, old, perdurable, perennial, permanent, perpetual, persisting, stable, till the cows come home, unceasing, undying, unremitting |
Antonyms: |
ceasing, ending, ephemeral, fleeting, passing, short-lived, temporary, transient |
| Main Entry: | long-standing |
| Part of Speech: | adjective |
| Definition: | existing for some time |
Synonyms: |
abiding, durable, enduring, established, fixed, lasting, long-established, long-lasting, long-lived, traditional |
| Notes: | long-standing has a hyphen; longtime does not |
| Main Entry: | perennial |
| Part of Speech: | adjective |
| Definition: | enduring, perpetual |
Synonyms: |
abiding, annual, ceaseless, chronic, constant, continual, continuing, deathless, durable, eternal, everlasting, immortal, imperishable, incessant, inveterate, lasting, lifelong, long-lasting, long-lived, longstanding, never-ending, old, perdurable, permanent, persistent, recurrent, seasonal, sustained, unceasing, unchanging, undying, unfailing, uninterrupted, yearlong, yearly |
Antonyms: |
changing, intermittent, interrupted |
| 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: | serviceable |
| Part of Speech: | adjective |
| Definition: | useful, functional |
Synonyms: |
advantageous, aiding, assistive, beneficial, convenient, dependable, durable, efficient, handy, hard-wearing, helpful, invaluable, operative, practical, profitable, usable, utile, utilitarian, valuable |
Antonyms: |
unhelpful, unprofitable, unserviceable, useless, weak, worthless |
| Main Entry: | stable |
| Part of Speech: | adjective |
| Definition: | constant, fixed; resistant |
Synonyms: |
abiding, anchored, balanced, brick-wall, calm, deep-rooted, durable, enduring, equable, established, even, fast, firm, immutable, invariable, lasting, nailed, perdurable, permanent, poised, reliable, resolute, safe, secure, set, set in stone, solid, solid as a rock, sound, stabile, stalwart, stationary, staunch, staying put, steadfast, steady, stout, strong, sturdy, substantial, sure, together, tough, unalterable, unchangeable, unfluctuating, uniform, unvarying, unwavering, well-built, well-founded |
Antonyms: |
inconstant, shaky, unfixed, unstable, wobbly |