Mass-productions refer to the large-scale production of goods in factories using machinery and assembly lines. Synonyms for mass-productions could include assembly-line production, high-volume manufacturing, industrial-scale production, or large-scale manufacturing. These terms highlight the mechanized nature of the production process, emphasizing its efficiency and cost-effectiveness. Other possible synonyms could include standardized production, serial production, or repetitive manufacturing. These terms underscore the repetitive nature of the production process, emphasizing the high level of consistency and uniformity that characterizes mass-produced goods. Overall, these synonyms reflect the modern, industrialized approach to manufacturing that has been dominant in many parts of the world since the early 20th century.