There are various synonyms for the phrase "prove to be wrong" that denote the same meaning. These synonyms are useful when we want to convey a message that someone's assumption or belief is incorrect. Words that can be used instead of "prove to be wrong" include "disprove," which suggests that evidence has been presented to debunk a claim. Another word that could be used in place of "prove to be wrong" is "refute," which implies that the argument being presented is not valid. "Contradict" is another synonym that suggests that someone's statement goes against another's. Finally, "rebut" is another synonymous word that implies that arguments are being contradicted.