Graving dock and Traffic

Graving dock noun - A large dock from which water can be pumped out; used for building ships or for repairing a ship below its waterline.

Traffic and graving dock are semantically related. In some cases you can use "Traffic" instead a noun phrase "Graving dock".

Traffic noun - The buying and selling of goods especially on a large scale and between different places.

Graving dock and traffic are semantically related. Sometimes you can use "Graving dock" instead a noun "Traffic".