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It is were the sea erodes right through the land leaving a bit on each side and a curved bit at the top but sometimes the top bit falls into the sea and then the bits that are left are called a stack.
A tiny bit of land is called a plot or a parcel.
The land next to the sea is called the "Shore".
Land along an ocean or sea is called a coastline.
if the land surrounding the sea is below sea level
coast
Land above sea level could be anything from flat lands to a plateau. It depends on the location of the sea and land.
Penis+vagina=sex
A pointed area of land sticking out into the sea is called a "cape."
Colder air blowing in from the sea to the land is called a "sea breeze".
The Coast
SHORE.