OILY MATTER is a term used to describe substances that are composed of oil or GREASE. GREASE, which is a 6-letter word, is a type of lubricant that is made up of a combination of oil and other materials such as soap, wax, or clay. It is used to reduce friction between two surfaces and to protect them from corrosion. GREASE is commonly used in automotive and industrial applications, as well as in the food industry.