The phrase "Colgate smile" refers to a bright, white, and perfect smile that is often associated with good dental care. While this phrase is commonly used, there are several synonyms that can be used to describe the same type of smile. Some of these synonyms include "glowing smile," "brilliant smile," "radiant smile," or "gleaming smile." Other alternatives to the term "Colgate smile" may include "million-dollar smile" or "Hollywood smile." These synonyms can be used interchangeably to describe a beautiful and healthy smile that is often attributed to good oral hygiene practices and a healthy lifestyle.