The tilting of the front wheels away from the vertical, when viewed from the front of the car is called

positive camber

Camber angle is the angle made by the wheels of a vehicle; specifically, it is the angle between the vertical axis of the wheels used for steering and the vertical axis of the vehicle when viewed from the front or rear. It is used in the design of steering and suspension.
When the top of the wheel is tilted outward, then it is called positive camber.

uneven tyre wear

either 'a' or 'b'

maintain directional control