What is the noun for something that has been produced or made?

The noun that refers to something that has been produced or made is "product." This term specifically denotes an item that has been created as a result of a manufacturing process or service provision. In commercial contexts, a product can be anything from goods sold in a store to services offered by a business.

"Production," on the other hand, refers to the overall process of making goods or services, rather than the end item itself. "Processor" denotes a machine or person that processes data or materials, and "producer" usually refers to a person or entity that creates or supplies goods, but does not specifically denote the final item that is produced. Thus, "product" is the best choice for identifying the noun that conveys the idea of something that has actually been made.