Collocations for coastline - noun

long
beautiful, spectacular
rocky, rugged, wild
Atlantic, Mediterranean, etc.
unspoiled

stretch
long stretches of unspoilt coastline

follow
The road follows the Pacific coastline.

stretch
The coastline stretches for miles.

erode

along a/the coastline
They sailed along the rugged coastline.

around a/the coastline, round a/the coastline (esp. BrE)
They're sailing around the Atlantic coastline of Florida

off a/the coastline
They fish off the Wanganui coastline.