Traffic (in) is a term used to describe the movement of goods, services, and people from one place to another. TRADE (5 letters), DEAL (4 letters), and SELL (4 letters) are all related terms that refer to the exchange of goods and services between two or more parties. TRADE is the process of exchanging goods and services between two or more parties, while a DEAL is an agreement between two or more parties to exchange goods and services. SELL is the act of transferring ownership of goods or services in exchange for money. All three terms are related to traffic (in) as they involve the movement of goods, services, and people from one place to another.