continual
constant, continuous, endless, eternal, everlasting, frequent, incessant, interminable, oft-repeated, perpetual, recurrent, regular, repeated, repetitive, unceasing, uninterrupted, unremitting
Antonyms
broken, ceasing, erratic, fluctuating, fragmentary, infrequent, intermittent, interrupted, irregular, occasional, periodic, spasmodic, sporadic, terminable