Communications relay satellites, also known as comsats, are critical to modern communication networks. However, there are various synonyms for this term that can be used interchangeably, depending on the context. For instance, they can be called communication satellites, data-relay satellites, or signal relay satellites. They are designed specifically to act as a link between different communication points on the ground. They help ensure the transmission of data and information between individuals and organizations across the globe. All in all, these satellites remain an essential tool for modern-day communication, and knowing their synonyms is crucial to effective communication in different contexts.