Synonyms of unceasing

2 Syllables

yearlong, undying, nonstop, long-term, termless, constant, running, endless, steady, lasting, longterm

3 Syllables

unyielding, fireball, ceaseless, unflagging, perennial, persistent, perpetual, unended, eternal, longstanding, round-the-clock, aeonian, unwaning, day-and-night, continual, cursive, relentless, unending, permanent, untiring, incessant, continuous

4 Syllables

unretiring, unremitting, around-the-clock, oft-repeated, sempiternal, never-ending, everlasting, never-ceasing, sustainable

5 Syllables

interminate, interminable, uninterrupted