EUE stands for "External Upset End" and is a type of pipe thread commonly used in the oil and gas industry. Some synonyms for EUE include external upset thread, API external thread, and tapered thread. The EUE thread design allows for a strong connection between two pieces of pipe, making it ideal for use in high-pressure environments. Other thread designs that are similar to EUE include internal upset thread and integral joint. It is important to use the correct thread design when connecting pipes to ensure a safe and secure connection.