There is only one common synonym for the term "bit bucket", which is "null device". This term is commonly used in Linux operating systems and other computer networking environments. It is typically used to describe a location in a computer system where data or information is intentionally discarded or ignored, rather than being stored or processed. Other possible synonyms for "bit bucket" might include terms like "black hole", "void", "dummy file", "garbage can", or "junk folder", but these terms are not commonly used in the same context as the original term. Overall, "bit bucket" remains the most widely recognized term for this concept.