Breakwater rhymes with:
backwater, drinkwater, pinkwater, backwater, bridgewater, bywater, clearwater, coldwater, deepwater, drinkwater, fitswater, fitzwater, floodwater, freshwater, goldwater, headwater, pinkwater, rainwater, sidewater, stillwater, tidewater, underwater, wastewater, whitewater
Breakwater sounds like:
barrister, brester, brewster, brigadeer, brigadier, brighter, brister, bruster