Ais a piece of land that juts out into water. continent landmass reef peninsula

A peninsula is a piece of land that juts out into the water. 

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reef peninsula

Explanation:

A part of the landmass that juts out in the water is a typical example of the peninsular as the landmass form around a large body of water such as a body of lake or sea. As a landmass is projected outward into the ocean and is bounded by water on all the three sides and thus described as a near island that connects to the mainland.