Turning the palm up is called SUPINATION
This is a forearm motion, not a wrist motion. The name can be remembered because this is the position to hold SOUP in your hand.

Turning the palm down is called PRONATION
This is also a forearm motion, not a wrist motion. The name can be remembered because this is the position to POUR soup out of your hand.

Flexion and extension are properly described as wrist motions.

Radial and ulnar deviation are properly described as wrist motions.