Biblical is a common word used to describe anything related to the Bible or Christianity. However, there are many synonyms that can be used in its place to add variety and depth to your language. For example, biblical can be replaced with scriptural, meaning anything related to scripture or sacred texts. Another synonym could be religious, which encompasses all faiths and beliefs. Divine is another synonym that can be used to describe something that is inspired by God or a higher power. Lastly, holy can be used to describe something that is sacred or related to religion. By using these synonyms, you can add diversity to your language and make your writing or speech more dynamic.