The term 'Guinness Order' refers to the two types of glasses used to serve Guinness beer. The first is a STOUT, which is a 5-letter word, and the second is a pint, which is a 4-letter word. A STOUT is a type of glass that is slightly taller than a pint and has a wider base. It is typically used for serving Guinness beer, as it allows the beer to settle and form a creamy head. A pint is a smaller glass that is usually used for other types of beer. Both glasses are designed to enhance the flavor and aroma of the beer.