Hold true is a phrase that is commonly used when something has been proven to be accurate or correct. However, there are several synonyms that can be used to express the same sentiment, such as remain valid, stand the test of time, remain factual, be upheld, and retain its authenticity. These synonyms can be used interchangeably with hold true to convey the same message. For instance, the saying "practice makes perfect" has stood the test of time and remains valid even today. In conclusion, hold true is a versatile phrase and can be replaced by several synonyms to effectively convey the same message.