apoplexy billow bore breakers breakup cataclysm chop choppiness chopping sea climax comb comber convulsion diastrophism dirty water disaster eagre fit gravity wave ground swell heave heavy sea heavy swell lift lop overthrow paroxysm peak popple quake riffle ripple rise roll roller rough water scend sea send spasm stroke surf surge swell temblor tidal bore tidal wave tide wave trough undulation upheaval water wave wave wavelet white horses whitecaps