The term "dust buster" is commonly used to refer to a handheld vacuum cleaner. However, there are several synonyms that can be used interchangeably to describe this machine. One such synonym is "handheld vac," which is commonly used to describe a portable vacuum that can be held in one's hands. Another synonym to consider is "mini vacuum," which refers to a smaller version of a traditional vacuum cleaner. Additionally, "cordless vacuum" is a synonym that describes a vacuum that does not require a cord or electrical outlet, making it convenient for quick cleanups. Other possible synonyms for "dust buster" include "portable vacuum" and "dust collector." Ultimately, the choice of synonym may depend on the specific features and characteristics of the device being described.