Wave action refers to the movement and energy generated by waves in the ocean or other bodies of water. Synonyms for the term might include terms like surge, swell, tide, rip, or current. These words all imply a sense of movement or motion, with various connotations depending on the specific term used. For example, "surge" might suggest a sudden and powerful movement akin to a sudden gust of wind, while "tide" might suggest a more gradual and persistent ebb and flow of water. Other related terms might include words like "undulation," "sway," or "rocking," each of which captures a particular aspect or nuance of the movement and energy that waves can produce.