The term 'bind tightly' can be represented by two crossword solutions: TRUSS (5 letters) and TRUSSUP (7 letters). A TRUSS is a structure made of connected elements that is used to support a load. It is typically composed of straight members connected at joints, and is used in bridge and roof construction. Trussup is a variation of the TRUSS, where the members are connected with bolts or rivets instead of joints. Both TRUSS and trussup are used to bind tightly and provide support for a load.