Nouns

(n)barrel, gun barrela tube through which a bullet travels when a gun is fired
(n)barrel, caska cylindrical container that holds liquids
(n)barrel, druma bulging cylindrical shape; hollow with flat ends
(n)barrel, barrelfulthe quantity that a barrel (of any size) will hold
(n)barrel, bblany of various units of capacity“a barrel of beer is 31 gallons and a barrel of oil is 42 gallons”

Verbs

(v)barrelput in barrels