Synonyms of imperishable

2 Syllables
yearlong, undying, diurnal, deathless, termless
3 Syllables
enduring, perennial, perpetual, unended, eternal, unchanging, immortal, perduring, unfading, forever, permanent
4 Syllables
sempiternal, undestroyable, everlasting, never-ceasing, unbribable, sustainable
5 Syllables
irrefragable, irrefrangible, indissoluble, nonperishable, incorruptible, indestructible
6 Syllables
inexterminable, inextinguishable