"CETS" is a technical term used in the context of the European Union's Common European Transport System. While there may not be traditional synonyms for this term, there are related terms that can help clarify its meaning. These could include "transportation infrastructure," "transportation network," "transportation system," or "transportation grid." Additionally, more specific terms such as "railway network," "road network," or "aviation system" could be used to refer to individual components of the CETS. Ultimately, the goal of any synonym or related term is to help communicate the complex and interconnected nature of transport systems, and the role that the CETS plays in connecting people, goods, and ideas throughout Europe and beyond.