skateboard
Wooden, usually concave board mounted on four small wheels; it is guided by body movements.
truck 
Device that connects the wheels to the board; it enables the wheels to change direction.
nose 
Front end of the board.
tail 
Rear end of the board.
wheel 
Small round object that turns on an axis so the board can move backward or forward; its diameter and durability vary with the activity.
grip tape 
Rough surface attached to the board that helps the skater’s shoes adhere to it.