The term 'joined with metal' can be described by the crossword solution 'WELDED', which is a 6-letter word. Welding is a process of joining two or more pieces of metal together by melting them and using a filler material to form a strong bond. It is a common technique used in many industries, such as automotive, aerospace, and construction. Welding is a skill that requires precision and safety precautions, and it is often used to create permanent connections between metal components.