The term STRONG WOOD is composed of two words, OAK and STRONG. OAK is a type of hardwood tree that is known for its strength and durability. It is one of the most popular woods used in construction and furniture making due to its strength and resistance to decay. OAK is also used in flooring, cabinetry, and other woodworking projects. Its grain pattern is distinctive and it is often used to create beautiful pieces of furniture.