As nouns the difference between cart and kar
is that
cart is a small, open, wheeled vehicle, drawn or pushed by a person or animal, more often used for transporting goods than passengers while
kar is deliberate misspelling of lang=en.
As a verb cart
is to carry goods.
As a proper noun CART
is acronym of lang=en|Championship Auto Racing Teams, a defunct sanctioning body for open-wheel racing in motorsports in the United States of America.