Synonyms of unfading

2 Syllables
undying, diurnal, deathless, termless
3 Syllables
enduring, durable, perpetual, unended, eternal, unchanging, immortal, perduring, abiding, permanent
4 Syllables
unbreakable, immutable, unchangeable, undestroyable, indelible, sempiternal, everlasting, phoenixlike
5 Syllables
irrefragable, unalterable, irrefrangible, amaranthine, indissoluble, inextirpable, nonperishable, incorruptible, imperishable, indestructible
6 Syllables
inexterminable, inextinguishable