That is a wharf or a dock.
A dock or bay OR Port
Normallt called a port, may be a dock or a pier
Yes, the word "port" can be a noun. It can refer to a place where ships load and unload goods, as well as a type of wine.
It is called a port
dock, port, harbour, jetty, wharf, quay...
A navy is a group of ships that use a pier as a place to dock, load, or unload.
A port.
port
A permanent structure for ships to load and unload cargo and passengers.
The quay, which is pronounced like "key" is, can be defined as a place like a warf or structured bank alongside which a ship can moor to load or off load cargo. A link is provided below.
Yes, "seaport" is a word. It refers to a harbor or city located by the sea where ships can dock to load and unload cargo or passengers.