Train de haute vitesses, also known as TGV, is a high-speed train that is popular in France and other European countries. There are several synonyms that people use when referring to this type of train. One of the most common synonyms is high-speed train, which simply describes the train's ability to travel at very fast speeds. Some people also refer to TGV trains as bullet trains, which is a term that originated in Japan and has come to be associated with fast trains all over the world. Other possible synonyms for TGV include express train, rapid transit, and fast train. Regardless of what term you use, TGV trains are an efficient and convenient way to travel across Europe with speed and comfort.