The waves are the rhythmic movements of water that are often observed in oceans, seas, and lakes. Synonyms for the word "waves" include undulation, ripple, surge, billow, and swell. The undulation refers to a gentle, continuous motion of water, while ripple indicates small waves or ripples that are formed on the surface of water. Surge suggests sudden and strong movements of water, while billow describes a large and rolling wave. On the other hand, the word swell signifies a long and steady rise and fall of water that is formed by the wind's force. So, there are several terms to describe the waves that we admire during our walk along the seashore.