The Oxford Thesaurus An A-Z Dictionary of Synonyms - endless adj.

1) limitless, unlimited, boundless, unbounded, infinite, immeasurable, eternal, unending: They found themselves in the endless reaches of outer space. 2) ceaseless, uninterrupted, incessant, unceasing, unending, constant, perpetual, interminable, unremitting, non-stop, continuous, continual, everlasting: I wish you two would stop your endless bickering.