THESAURUS
tide gate
aboideau, air lock, direct tide, dock gate, ebb, ebb and flow, ebb tide, flood, flood tide, flood-hatch, floodgate, flow, flux, flux and reflux, full tide, gate, head gate, high tide, high water, lock, lock gate, low tide, low water, lunar tide, neap, neap tide, opposite tide, penstock, refluence, reflux, rip, riptide, sluice, sluice gate, solar tide, spring tide, thalassometer, tidal amplitude, tidal current, tidal current chart, tidal flow, tidal range, tide, tide chart, tide gauge, tide race, tide rip, tidewater, tideway, water gate, weir