Octane :  (noun)

1: any isomeric saturated hydrocarbon found in petroleum and used as a fuel and solvent

alcohol, benzine, briquette, burnable, butane, carbon, charcoal, coal, coke, combustible, dope, ethane, ethanol, fireball, firing, flammable, flammable material, fuel, fuel additive, fuel dope, gas, gas carbon, gasoline, heptane, hexane, inflammable, inflammable material, isooctane, jet fuel, kerosene, methane, methanol, natural gas, oil, paraffin, peat, pentane, propane, propellant, rocket fuel, turf,