The crossword solution for the term 'Word with BARON or Basin' is 'OIL'. OIL is a fossil fuel that is used to power many of the world's vehicles and machines. It is also used in many industries, such as cosmetics, plastics, and pharmaceuticals. OIL is found in underground reservoirs, often referred to as basins, and is extracted by drilling. The term 'BARON' is often used to refer to an OIL BARON, which is a person who owns or controls large amounts of OIL.