Antonyms for the term "custom making" could include standardization, mass production, and off-the-shelf. Standardization refers to producing something according to a set of predetermined specifications or standards, whereas custom making involves creating something specifically tailored to the client's unique needs or preferences. Mass production, on the other hand, involves creating large quantities of identical products with minimal customization or personalization. Finally, off-the-shelf refers to pre-made products that are readily available for immediate purchase without any customization options. These antonyms highlight the difference between personalized, individualized products versus those that are standardized, mass-produced, or already made.