mazut

As a noun mazut

is (petrochemistry) a heavy, low-quality fuel oil, used in generating plants and similar applications, or broken down to produce diesel.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between diesel and mazut

is that diesel is a fuel derived from petroleum (or other oils) but heavier than gasoline/petrol. Used to power diesel engines which burn this fuel using the heat produced when air is compressed while mazut is a heavy, low-quality fuel oil, used in generating plants and similar applications, or broken down to produce diesel.

As a verb diesel

is to ignite a substance by using the heat generated by compression.

As nouns the difference between oil and mazut

is that oil is while mazut is (petrochemistry) a heavy, low-quality fuel oil, used in generating plants and similar applications, or broken down to produce diesel.

As nouns the difference between fuel and mazut

is that fuel is substance consumed to provide energy through combustion, or through chemical or nuclear reaction while mazut is a heavy, low-quality fuel oil, used in generating plants and similar applications, or broken down to produce diesel.

As a verb fuel

is to provide with fuel.