In-car is a term used to describe anything that is inside a car. However, there are several synonyms that can be used to replace the term in-car. These include: within the vehicle, interior of the car, on-board, inside the automobile, and inside the car cabin. Each of these terms can be used to describe a different aspect of the car's interior. For example, within the vehicle can be used to describe anything that is located anywhere inside the car. On-board is used to describe anything that is installed or placed onto the car, while inside the automobile is used to describe anything that is located inside the car but not attached to it.