The phrase "squeaky-clean" is often used to describe something that is extremely clean or pure. There are many synonyms for this phrase that can be used to convey the same meaning. For example, "immaculate" could be used to describe something that is completely spotless and free from any dirt or blemishes. "Pristine" could be used to describe something that is in its original condition and has not been damaged in any way. "Sterile" could be used to describe something that is completely free from any bacteria or other harmful organisms. Other synonyms for "squeaky-clean" include "flawless," "spotless," "untainted," and "pure".