A burlap bag is a type of SACK made from JUTE, HEMP, or other coarse fabrics. It is often used for storage, shipping, and packaging purposes. The term 'SACK' is a four-letter word for a large bag, while 'SACKS' is a five-letter word for multiple bags. Similarly, 'JUTE' is a four-letter word for a type of fiber used to make burlap bags, while 'jutes' is a five-letter word for multiple fibers. Finally, 'HEMP' is a four-letter word for a type of plant fiber used to make burlap bags.