The term 15-PERCENTER is a job description for an AGENT, which is a 5 letter word. An AGENT is someone who acts on behalf of another person or organization, typically in negotiations or business transactions. They are responsible for representing their client's interests and negotiating the best possible outcome. Agents often receive a commission or fee for their services, usually a percentage of the total transaction. A 15-PERCENTER is an AGENT who receives a 15% commission for their services.