The phrase "re proves" means to prove something again or to demonstrate the truth of it once more. Synonyms for this phrase include "reassert", "substantiate", "verify", "establish", "confirm", "validate", "corroborate", and "demonstrate". These words all convey the same idea of showing or proving something consistently or repeatedly. Whether you choose one of these synonyms or the original phrase, the implication is that you have already proven something once before and need to do so again for clarification, emphasis, or reinforcement. Choosing the right word for your context can help you convey your meaning more clearly and effectively.