A not so simple question
 

Why is it that when you transport something by car, it's called a shipment, but when you transport something by ship, it's called cargo?

Because you're rather confused and not comparing like for like?

Who cares?

Why do you drive on a parkway, and park in a driveway?

Because Cargo means a Car that Goes....... Meaning it Goes extra fast, meaning it's probably a fast ship

that is really sad...lol.
chicken-in-the-car-and-the-car-won't-go - Chicago. (it's the only thing i could think of that was equally lame!)