A clean bill is a term used to describe a piece of legislation that has been passed without any changes or amendments. Synonyms for this term include an unaltered bill, a pristine bill, and a spotless bill. Other synonyms for clean bill may include an unimpeachable bill, a faultless bill, and a perfect bill. These synonyms are often used to describe legislation that has been scrutinized and evaluated to ensure that it meets all legal requirements and has no flaws. Regardless of the specific term used, a clean bill is an indicator that the legislation has been thoroughly reviewed and is considered to be legally sound and effective.