I say In FP you do everything by operate on pure functions, functions composition, higher order functions.
So for example you can have higher order function drive-common with common logic for drive that has as input parameter lower order function with logic specific to Car car-specific or Vehicle vehicle-specific.
pseudo code:
drive-for-car = drive-common(car-specific)
drive-for-vehicle = drive-common(vehicle-specific)
PS
Processes are not the same as objects in OOP and I will say they has nothing to do with polymorphisms.
