The strip of land that borders the coastline and is washed by waves is called the shoreline.

Here's a breakdown:

* Coastline: This refers to the general boundary between land and sea. It's a broader term encompassing the entire area influenced by the sea.

* Shoreline: This is the specific line where the sea meets the land at any given moment. It's constantly changing with the tides.

So, while the coastline is the larger concept, the shoreline is the dynamic, ever-shifting zone directly impacted by the waves.