An inlet is any area of water that extends into the land from a larger body of water. Inlets are smaller than gulfs.
A body of water that extends into land may be:- a bay a Fjord an inlet an estuary
It is called an isthmus or peninsula.
A body of water that extends into the land.
Peninsula
bay
A piece of land that extends a long way into a body of water is called a 'penninsula'. If it extends only a short way it is called a 'headland' or 'promontory' or 'foreland' The tip of a continent is called a 'cape'.
A body of water that extends into land can be an inlet or fjord.
If it is small and doesn't stick out a lot it is called a cape. If it sticks out more, it is called a peninsula.
A peninsula is a point of land that extends into a body of water.
Peninsula
That is a peninsula.
A cape is a point of land extending into a body of water.