Mass produced refers to something that is manufactured in large quantities and often lacks uniqueness or individuality. There are several synonyms that can be used to replace the term mass produced. These include: factory-made, machine-made, assembly-line, standardized, and uniform. Each of these synonyms conveys the idea of something that is produced in large quantities with little deviation from the standard design. When you want to avoid using the term mass produced, you can use these synonyms to bring more specificity or nuance to your writing. Regardless of which synonym you choose, all convey the same idea of a product that has been produced in bulk.