oil (a thick black liquid from under the ground used to produce fuel or lubricant): This oil well produces 200 barrels a day.
fuel (a substance burned to provide heat or power): Oil, coal, gas, and wood are various types of fuel.
gas (a fossil fuel in gas form, used for heating and cooking): Do you use gas or electricity for your cooking?
coal (a hard black material mined from the ground and burned as fuel): This country has abundant coal mines.
petroleum (the refined products derived from oil, including gasoline, diesel, heating oil, jet fuel, and naphtha): They refine crude oil into various petroleum products.
petrol UK (a light fuel obtained from petroleum, used to power car engines and other vehicles): Petrol ignites very easily.
gasoline US formal (a light fuel obtained from petroleum, used to power car engines and other vehicles): This car runs on unleaded gasoline. (also, gas) I ran out of gas on my way home.
diesel (a heavy oil used as fuel in diesel engines): Most buses operate on diesel.
fossil fuel (a fuel such as gas, coal, or oil formed from the remains of dead plants or animals): Fossil fuels are depleting rapidly.
