Seam-weld is a term that is commonly used in the field of welding to describe the process of welding a seam. However, there are several other synonyms for this term that can be used to describe this process. One of the most common synonyms for seam-weld is "butt-weld", which refers to a type of welding that is used to fuse together two pieces of metal that are positioned in a manner that forms a seam. Other synonyms for seam-weld include "lap-weld", "edge-weld", and "splice-weld". Each of these terms describes a slightly different type of welding technique that is used to join metal pieces together.