The term firth can be used to describe a small body of water extending into a landform (estuary is also used in this context).
If this body of water is surrounded by mountainous land, the term fiord or fjord can be used if one wishes to be more precise.
name given to point of land extending into a body of water
inlet
An area of water extending into the land from a larger body of water is called a bay. Typically bays are found off of oceans and lakes.
This the definition of a Peninsula.
penisula
Peninsula.
a peninsula!
A peninsula.
Bay, coves and gulfs are areas of water extending into land from a larger body of water. Gulfs are largest, bays next and coves smallest.
it is called a peninsula
peninsula
Cape