The term 'Barrel Contents' can be broken down into four crossword solutions: ALE (3 letters), OIL (3 letters), FUN (3 letters), and AMMO (4 letters). ALE is a type of beer, usually made from malted barley, hops, yeast, and water. OIL is a liquid hydrocarbon that is used for fuel, lubrication, and many other purposes. FUN is an activity or experience that is enjoyable and entertaining. Lastly, AMMO is short for ammunition, which is the material fired, scattered, dropped, or detonated from any weapon.