The phrase "Defender of the Faith" has a long history in English language. It originated in the 16th century to describe the role of the British monarch as the protector of the Anglican faith. Today, it is most commonly used to describe a person or organization that defends and promotes a particular belief system or ideology. Synonyms for this phrase include "champion of the cause," "guardian of the faith," "protector of the belief," "advocate of the doctrine," "supporter of the creed," "defender of the ideology," and "upholder of the principle." Regardless of the term used, these individuals and organizations play a crucial role in safeguarding the beliefs and values that define them.