Buying and selling and Traffic

Traffic and buying and selling are semantically related in business topic. In some cases you can use "Traffic" instead a noun phrase "Buying and selling", when it comes to topics like trade, commerce.

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

Buying and selling and traffic are semantically related in trade topic. You can use "Buying and selling" instead a noun "Traffic".