[arviewer]

When we use this language, coming from English, Spanish or Dutch or whatever, we have that as reference. If you would use this language truely, I guess it would mean that you start to think differently about the objects. Maybe the difference between train and car is not that important anymore.

[posterboy]

Indeed, we speak of the cars of a train, while a highway truck with several cars attached is likewise called a train. A railway train is literally a train of railway cars. Then there's the cable car, which is not a train although it runs on tracks, but then again, a track car is a race car for race tracks, which a driver might do training with. And all of them could car-ry car-go.