SILK YARN is a type of yarn made from the fibers of the silkworm's cocoon. It is a very fine and strong material, often used for making delicate fabrics such as lingerie and evening wear. FLOSS, with five letters, is a type of thread made from silk, cotton, or nylon, and is used for embroidery and other decorative stitching. TRAM, with four letters, is a type of yarn made from silk and wool, and is often used for knitting and crocheting.