The term 'BIG TIER' can be solved by the five-letter word 'TWINE'. TWINE is a type of cord or string made from two or more strands of fiber twisted together. It is commonly used for tying, binding, and fastening items, and is also used in crafts such as knitting and crocheting. TWINE is often made from natural fibers such as cotton, jute, sisal, hemp, or linen, but can also be made from synthetic materials such as nylon or polypropylene.