That would be a 'Peninsula'.
The word comes from Latin in the early 1500s and is composed of "paene", meaning 'almost' and 'insula', meaning 'island'.
A body of water that extends into land may be:- a bay a Fjord an inlet an estuary
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.
An isthmus is a narrow strip of land that connects two larger landmasses and separates two bodies of water. It is not a body of water itself; rather, it acts as a land bridge between two larger land areas.
A cape is a geographical feature that typically extends into a body of water, such as an ocean or sea. It is formed by the erosion of the coastline, resulting in a point of land projecting outwards into the water.
A narrow strip of land surrounded on 3 sides by water is a peninsula.
A body of water that extends into the land.
Peninsula
bay
A body of water that extends into land may be:- a bay a Fjord an inlet an estuary
A body of water that extends into land can be an inlet or fjord.
Sounds to me like a peninsula jutting out from the land mass. Some people call that a finger of land as well.
An inlet is any area of water that extends into the land from a larger body of water. Inlets are smaller than gulfs.
Cape
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.
An area of land almost completely surrounded by water is called a peninsula. A peninsula is a narrow strip of land that extends out into a body of water and is connected to the mainland on one side.
Peninsula
That is a peninsula.