When it comes to changing a baby's diaper, a variety of synonyms can be used for "baby's napkin." Some may refer to it as a diaper, a nappy, or a diapering pad. Others may use phrases like "changing pad" or "baby changing mat." There are also disposable options such as "disposable diaper" or "disposable nappy." Cloth options may include "cloth diaper" or "reusable nappy." Many parents also use terms like "burp cloth" or "spit-up cloth" when referring to a napkin or cloth used to wipe up spills or messes during feeding time. Ultimately, the term used may vary based on personal preference or cultural norms.