Just in case anyone is still unsure
Spoiler. Usually a SMALL upturned lip that is designed to break up (or spoil) the airflow - usually, but not always - over the rear of the vehicle. Many vehicle shapes create lift at the rear end and a correctly positioned spoiler will break up the airflow thereby reducing the lift.
Wing. Shaped like an aircraft wing (hence its name) but upside down. Instead of producing lift it developes downforce. This is what hangs out at the front, rear and sides of F1 cars.
Most of the appendages attached to the rear of road cars are neither spoilers or wings, they are just plastic drag inducers. A lot of them look like wings but most have little or no aerodynamic properties and are there for show only. All they achieve is produce additional drag which will slow the car down!
Even a properly designed and positioned wing will not make a noticable difference to a road vehicle's downforce below 60mph.
For a wing to work properly it should be in clean air flow and be clear of the body, i.e. there should be nothing but air between the wing and the road surface
Now that you know how each works, you won't be calling them by the wrong name anymore, please?
Another one of my pet hates
is calling dampers shock absorbers. They are only called shocks in the USA.
The shock absorber on the suspension is the spring. The springs tendancy to continue to oscillate after being compressed would make the ride unbearable if left to their own devices. However, by fitting a damper these oscillations can be controlled.
So, the metal tube with a piston is called a damper in the UK, NOT a shock absorber.
If not convinced, try removing the springs from your car and see how much shock absorbing the dampers do!
End of lecture
I think I will go and lie down in a darkened room for a while.