Synonyms of permanent

1 Syllable

set, perm

2 Syllables

diurnal, stable, undying, steadfast, long-term, constant, lasting, longterm, fixed, yearlong, stablest, brick-wall, stabler, termless, dreadlocks

3 Syllables

enduring, durable, livelong, dateless, habitual, hardcore, coiffure, immortal, unceasing, perennial, unchanging, longstanding, diuturnal, timeless, continual, addicting, stabile, persistent, continuing, perpetual, unchanged, changeless, lifelong, unended, eternal, round-the-clock, aeonian, unwaning, perduring, unfading, long-lived, long-lasting, abiding, forever

4 Syllables

sempiternal, unremitting, long-continued, monolithic, immutable, invariable, monophonic, stationary, indelible, unchangeable, oft-repeated, monochrome, everlasting, never-ceasing, perdurable, phoenixlike, established

5 Syllables

irrefrangible, irreversible, inexpungible, inextirpable, nonperishable, irrevocable, irrefragable, indivisible, unalterable, inveterate, interminable, imperishable, indestructible, ineffaceable, inerasable, unrepealable, unreversible, rememberable

6 Syllables

inexterminable