Seiches, also known as standing waves, are rhythmic oscillations that occur in enclosed or partially enclosed bodies of water. While "seiches" is the commonly used term for this phenomenon, there are other words that can be used to describe it. Some synonyms for seiches include tidal oscillations, harbor oscillations, and lake seiches. Additionally, in some regions, "tilt" or "swing" may be used instead of seiches. Regardless of the specific term used, the occurrence of seiches can have significant impacts on water levels and can pose a threat to coastal communities during extreme weather events.