the opposite of sunken area is inlet
Europe and asia
A massive land area is called a continent. The continents are North America, South America, Europe, Asia, Africa, Antarctica, and Australia.
If it is a country surrounded by land and so having no coast, it is said to be landlocked. An open of land area surrounded by a forest is called a glade or meadow. You can have valleys and basins in terms of geographical forms of land surrounded by other kinds of land.
plateau.
An area of land that is sunken or depressed below the surrounding area
basin
the opposite of sunken area is inlet
Europe and asia
area, more commonly called areaway
Ocean
a broad area of flat or gently rolling land is called a plain.
A small area of land is called: A fobe.
a region
a region
The largest land masses are called continents.
the land which have less or scracity of water is called dry land area such as deserts are dry and xerophytic