Dam and Seawall

Dam noun - A bank of earth constructed to control water.

Seawall and dam are semantically related in dike topic. In some cases you can use "Seawall" instead a noun "Dam", when it comes to topics like dyke.

Seawall noun - A protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away.

Dam and seawall are semantically related in dike topic. You can use "Dam" instead a noun "Seawall", if it concerns topics such as dyke.