car.
The plural form of the noun 'auto' is autos.The noun 'auto' is a short form of automobile (plural automobiles).
Car.
The possessive form for the noun automobile is automobile's.
You can't
The plural form for the noun automobile is automobiles.
Automobile.
An automobile is a form of transportation that is done automatically. A car is a type of automobile, but not all automobiles are cars.
really short and flat
It is a convenient form of transportation.
automobile automatic
Continuous Automobile Research
That would be automobiles