"Weld des fabr" is a phrase that seems to be a typo or an incomplete thought. However, understanding the intended meaning as "welding of fabrics", we can explore synonyms related to this context. When it comes to joining fabrics together using heat and pressure, terms like fabric welding, fabric fusion, fabric bonding, or even textile fusion could be considered as synonyms. These phrases all refer to the process of creating a strong and seamless connection between fabric pieces. Whether used in textile manufacturing, art projects, or repairs, the essence remains the same, emphasizing the joining of fabrics through various techniques.