General terms:
* Lorry: (UK English)
* Van: (smaller truck)
* Semi-trailer truck: (articulated truck)
* Heavy-duty vehicle: (used for industrial purposes)
* Commercial vehicle: (used for business purposes)
* Motor vehicle: (general term for any vehicle with an engine)
* Freight carrier: (emphasizes its function)
* Delivery vehicle: (emphasizes its use)
Specific types:
* Pickup truck: (small truck with an open cargo bed)
* Dump truck: (truck designed to haul and dump materials)
* Box truck: (truck with a closed cargo box)
* Flatbed truck: (truck with a flat, open bed)
* Refrigerated truck: (truck with a refrigerated cargo area)
* Tanker truck: (truck designed to carry liquids)
Slang terms:
* Rig: (a truck and its trailer)
* Big rig: (a large semi-trailer truck)
* Hauler: (a truck used for hauling goods)
The best word to use depends on the specific situation and the type of truck you're describing.