THESAURUS
up and down
alternately, aplomb, at right angles, back and forth, backward and forward, backwards and forwards, by turns, completely, every other, exhaustively, hitch and hike, in and out, in rotation, in turns, inside out, make and break, off and on, perpendicularly, plumb, reciprocally, ride and tie, round and round, seesaw, sheer, sheerly, shuttlewise, square, to and fro, turn about
ROGET THESAURUS
up and down
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.