Sea foam refers to the white or light green frothy substance that forms on the surface of the ocean when waves break on the shore. Some synonyms for sea foam include ocean foam, surf bubbles, beach foam, wave foam, and whitecaps. These terms all describe the same natural phenomenon seen at sea, with foam forming from the agitation of water and air. The froth can be mesmerizing to watch and is often used as a symbol of the ocean's power and unpredictability. Other fun and poetic synonyms for sea foam include spume, churn, froth, and crests, all of which evoke the beauty and drama of the ocean.