Bowl
A section of a given wave in which the line of the wave bends, or appears to bend, toward the shore. The bend creates added intensity, often causing the wave to build into a peak, or grow hollower or steeper throughout its general curve. Nicknamed "bowl" because the wave suddenly becomes concave from a variety of angles, not just from the base or lip.
Buoy
A floating object moored to the bottom of the ocean to mark a channel, anchor, shoal, rock, etc. Buoys with sensitive meteorological and oceanographic instruments are also moored in deep-water locations to measure wind, weather, and wave information. This information is used to help forecasters monitor the progress of swells as they pass the buoy location.