A terminal is an electrical accessory. As the name implies, it’s an endpoint. It acts as a reusable endpoint of the conductor where you can connect circuits. In this sense, a terminal is a connector.
A connector is a general term. A terminal is a type of connector. Generally speaking, the connectors we usually use usually include a plastic case and a terminal. The plastic shell material is mainly plastic, plays a protective role. The material of the terminal is metal, which plays the role of conduction.