What is another word for trailer trucks?
Pronunciation: [tɹˈe͡ɪlə tɹˈʌks] (IPA) 
Trailer trucks are also commonly referred to as semi-trucks, tractor-trailers, big rigs, 18-wheelers, or simply "trucks." These vehicles are designed to haul large amounts of cargo and are recognized as an essential part of the transportation industry. The term "semi-truck" comes from the fact that the truck has a semi-trailer attached to it instead of a permanent cargo box. "Tractor-trailer" refers to the combination of the truck and the trailer. "Big rig" is a slang term used to describe the large and powerful nature of these trucks. "18-wheeler" specifically refers to the number of wheels on the vehicle, which includes both the truck and trailer.
