The term 'Fitted Together Tightly' can be described as 'DOVETAILED' (10 letters). Dovetailing is a type of woodworking joint that is used to join two pieces of wood together. It is created by cutting a series of interlocking wedge-shaped projections and recesses into the two pieces of wood, which are then fitted together tightly. This joint is strong and secure, making it an ideal choice for furniture and other woodworking projects.