Coastline
The outline of the land. Where
the land meets the sea
Waves
Wind driving water
Wave length, height
The horizontal distance between two wave crests
The vertical distance from the trough (base of a wave) to the crest (top of a wave)
Wave Fetch
The distance of water over which the wind blows
Swash/Backwash
Breaking waves rush water and sediment up the beach
The water that rushed goes back to the sea