True as gospel is a term used to describe something that is very accurate or honest. However, there are many synonyms for this phrase that can give a slightly different meaning and add some variation to your vocabulary. You could say something is "as authentic as it gets" when you want to emphasize how genuine and original it is. If you're talking about a rumor or piece of information, you might use "as reliable as the source" to indicate that it's based on a trustworthy source. "Pure as gold" can also be used to mean something is truthful or sincere, but with a positive connotation. Overall, choosing the right synonym for "true as gospel" can help you make your language more colorful and expressive.