В чем разница между beach shore and coast?

побережье.... не знаю может beach shore - эт побережье пляжа, а coast- просто побережье.

beach shore - берег пляжа, сам берег
coast - побережье, как регион, например : West coast of USA

Coast: land next to the ocean

Shore: land along the edge of an ocean, lake - a little more accurate than coast (generally the few metres of land right next to the water)

Beach: the land above the water line at a shore of a body of water, marked by an area of sand, rock or pebbles that have been brought there by the tide or waves. Usually used with the ocean. Thought of as an area to sunbathe, swim, generally have fun - rather than a strictly geographical location.

Seaside: more colloquial form of the shore or the beach: the land next to the ocean (on the "side" of the "sea"). Not usually thought of as a geographical place, like the shore, but, like the beach, is an area that has postive holiday-type connotations!

Bank: the land next to a body of water - usually rivers, sometimes lakes, but not often the ocean. Often used in plural, eg the banks of the river or riverbanks, because it implies the slope of land leading to the water, on either side.

beach - пляж
shore - береговая линия
coast - побережье как граница территории