differentiating between shore, shoreline, beach, coast, coastline. sand.

Usage of these words vary.I guess you would mostly talk of shore if you were at sea or out in a lake. The shoreline typically is the imaginary line separating land from sea, while shore is an expanse of land near the sea.If you were inland, you would usually talk of coast or coastline rather than shore or shoreline. You might use "shore" for the expanse of land near a large lake or wide river, but you probably would not use "coast" that way.Beach: suggest a pleasant place for swimming or as a park. And you could have a beach alongside a river or lake, not just the ocean.I'm not sure why "sand" is in your list. There are beaches that are not particularly sandy, and there is a lot of sand in the Sahara desert.