The phrase 'beyond belief' is often used to describe something that is extremely hard to comprehend or accept. There are many synonyms for 'beyond belief,' such as incredible, unbelievable, extraordinary, unimaginable, and unbelievable. These words convey a sense of amazement, astonishment, and disbelief. For example, you could say that the amount of money a famous athlete earns is incredible, or that the feats of an Olympic champion are extraordinary. Similarly, you could describe a shocking turn of events as unimaginable or unbelievable. Overall, there are many words that can be used instead of 'beyond belief,' depending on the context and the level of intensity you want to convey.