The term 'grease' can be defined by several crossword solutions. LUBRICANT is a nine letter solution and refers to a substance used to reduce friction between two surfaces. LUBRICATE is also a nine letter solution and means to apply a LUBRICANT to a surface. BRIBE is a five letter solution and is a payment made to someone in order to influence their behavior. FAT is a three letter solution and is a type of oily substance found in animals and plants. OIL is also a three letter solution and is a liquid hydrocarbon that is used as a fuel or LUBRICANT. AXLE is a four letter solution and is a shaft that connects two wheels. LARD is a four letter solution and is a type of FAT used in cooking. Finally, LUBE is a four letter solution and is a slang term for LUBRICANT.