The term 'strong cord' can refer to three different items: ROPE (4 letters), CABLE (5 letters), and TWINE (5 letters). ROPE is a thick, strong cord made of natural fibers such as hemp, jute, or sisal. CABLE is a strong, flexible wire made of metal strands. TWINE is a thin, strong cord made of two or more strands of twisted fibers. All three items are used for a variety of purposes, from tying down objects to providing support for structures.