Synonyms and related words :
aspen, ceaseless, chattering, constant, continual, fluctuant, fluctuating, fluctuational, full, harmonic, incessant, libratory, machine gun, mellow, nutational, oscillating, oscillatory, palsied, pendular, pendulous, perennial, periodic, perpetual, plangent, pulsating, pulsing, quaking, quavering, quavery, quivering, quivery, rapid, regular, repeated, resonant, resonating, rich, rolling, shaking, shaky, shivering, shivery, shuddering, sonorous, staccato, steady, stuttering, succussatory, succussive, sustained, throbbing, trembling, trembly, tremulous, unbroken, unceasing, unchanging, unintermitted, unintermittent, unintermitting, uninterrupted, unremitting, unstopped, unvarying, vacillating, vacillatory, vibrant, vibratile, vibratory, wavering, wobbly