The term "sure tests" can be replaced by various synonyms. One such synonym is "definitive tests" that refers to a test or procedure that provides an accurate and conclusive diagnosis. Another synonym is "foolproof tests" that denotes a test that is guaranteed to produce reliable and accurate results. "Confirmed tests" is another synonym that signifies a test that has been validated through multiple reliable sources. "Certified tests" is yet another synonym that gives credence to a test that has been approved or endorsed by a recognized authority. These synonyms provide a comprehensive understanding of the term "sure tests" and can be effectively used interchangeably.