RUDP stands for Reliable User Datagram Protocol, a networking protocol used for reliable data transmission between endpoints in a network. Some synonyms for RUDP include reliable UDP, UDP-based reliable messaging, and robust UDP. These terms describe the same protocol that employs the features of UDP, such as low latency and efficient packet handling, while offering the reliability of TCP. Compared to TCP, RUDP provides a faster and more efficient transmission of data, making it suitable for applications that require real-time communication and low latency, such as online gaming and video streaming. Overall, RUDP, along with its synonyms, plays a crucial role in ensuring the reliable transmission of data across networks.