A heavy goods vehicle (HGV) is a type of commercial vehicle that is designed and built for the transportation of heavy loads. However, there are a number of synonyms that can be used for this term. Some of the most common ones include commercial truck, tractor-trailer, big rig, and semi-truck. Other synonyms that can be used include rig, lorry, and haulage truck. Regardless of the term used, it is important to note that these vehicles are crucial for the transportation of goods and materials across the country, and they play a vital role in keeping the economy moving.