THESAURUS
alternate, beating, circling, cyclic, epochal, even, every other, fluctuant, fluctuating, fluctuational, harmonic, intermittent, isochronal, libratory, measured, metronomic, nutational, oscillating, pendular, pendulating, pendulous, periodic, periodical, pulsing, reciprocal, recurrent, recurring, resonant, rhythmic, rotary, seasonal, serial, shilly-shally, shilly-shallying, steady, undulant, undulatory, vacillating, vacillatory, vibratile, vibrating, vibratory, wavelike, wavering, wheeling, wobbly
ROGET THESAURUS
Oscillation
N
oscillation, vibration, libration, motion of a pendulum, nutation, undulation, pulsation, pulse, alternation, coming and going, ebb and flow, flux and reflux, ups and down, fluctuation, vacillation, wave, vibratiuncle, swing, beat, shake, wag, seesaw, dance, lurch, dodge, logan, loggan, rocking-stone, vibroscope, oscillating,
oscillatory, undulatory, pulsatory, libratory, rectilinear, vibratory, vibratile, pendulous, to and fro, up and down, backwards and forwards, hither and yon, seesaw, zigzag, wibble-wabble, in and out, from side to side, like buckets in a well.