fief
A piece of land that juts into the water is called a peninsula.
It was called a Land Grant, or Royal Grant.
Fuedalism, or the Fuedal System, was instituted throughout Medieval Europe. In the Fuedal System, serfs, or peasants, work on land belonging to a lord, in exchange for protection. This land was owned by a lord, who lived in a manor house, and had a small private army of knights, who defended the manor in return for a small amount of pay and a place to live. Fuedalism was abolished at the turn of the 17th century and was replaced by absolutism, or a system where nations are ruled under one monarch, or ruler.
It's called a Plain.
A piece of land used for growing crops is called a field or a farm.
Delta is the name for such a piece of land.
According to Merriam-Webster, a piece of land protruding from a larger land area into a body of water could be called a peninsula or a cape.
a land form that is a flat piece of land is called a plateau. Ps if thats wrong soz
this is called an island
Fertile
A fief
That is called a promontory