What is the term for exchanging one good or service for another?

The correct term for exchanging one good or service for another is "Trade." Trade refers specifically to the act of buying, selling, or swapping goods and services between individuals or groups. This can occur on a small scale, such as between individual consumers, or on a large scale involving countries and international markets.

When considering other related terms, "Commerce" broadly encompasses all activities related to the buying and selling of goods and services, and while it includes trade, it also involves other aspects such as the regulatory environment and logistics. "Negotiation" refers specifically to the process of discussion aimed at reaching an agreement, which may occur in various contexts beyond just the exchange of goods or services. "Bartering," on the other hand, is a specific form of trade that involves direct exchange without the use of money, where one good or service is exchanged for another. While closely related, bartering is a subset of the broader concept of trade. Therefore, while bartering is indeed a form of trade, the term "Trade" most accurately captures the general concept being asked about in this question.