whats the difference between bucket and barrel?

whats the difference between bucket and barrel? Whats the difference between lettuce and cabbage whats the difference between chloride and chlorate? whats the difference between colon and intestine? whats the difference between the flu and the swine flu. Whats the differences between "I really dont understand" and the difference between chinese and western wedding the difference between character and characteristics the difference between sex and gender the difference between A and B the difference between " mental problem "and "psychological What the difference between "puzzle" and "confuse"