When referring to the process of placing goods or materials on an assembly line, there are several different synonyms that can be used. One common phrase is "feed onto the conveyor" which implies that the items are being steadily moved along a conveyor belt for processing. Another phrase to describe this process is "line up for production" which suggests that the items are being arranged in a specific order in preparation for manufacturing. Other synonyms for "put on the assembly line" could include "load onto the production line" or "place in the manufacturing queue," both of which describe the act of positioning items in a line for further processing.