A sudden and powerful surge.
A large, sudden, and disastrous wave of water caused by a tremendous disturbance in the ocean; a tsunami. (See Usage notes below.)
A crest of ocean water resulting from tidal forces.
A large, sudden inundation of water from the storm surge, or waves of that surge; a sudden surge of river water.
A large and sudden rise and fall in the tide.
A large and generally unstoppable surge.
A very large and destructive wave, generally caused by a tremendous disturbance in the ocean, such as an undersea earthquake or volcanic eruption. Tsunami are usually a series of waves, or wave train.