Lissajous figure alternate alternation back and fill back-and-forth battledore and shuttlecock be poised billow break comb come and go coming and going crash dash direct tide ebb ebb tide flood flood tide flounder flow fluctuate flux flux and reflux full tide go through phases heave high tide high water hitch and hike lift low tide low water lunar tide neap neap tide opposite tide oscillate pass and repass peak pendulate popple reciprocate reciprocation refluence reflux rhythmic play ride and tie ring the changes rip riptide rise rise and fall roll scend seesaw seesawing send shift shuffle shuttle shuttlecock sine wave smash solar tide spring tide stagger surge sway swell swing teeter teeter-totter teeter-tottering teetering thalassometer tidal amplitude tidal current tidal current chart tidal flow tidal range tide tide chart tide gate tide gauge tide race tide rip tidewater tideway to-and-fro toss totter tottering turn undulate ups and downs vacillate vary wave waver wax and wane wibble-wabble wigwag wobble zigzag