There are several synonyms that can be used for the phrase "hath right to". One common alternative is the phrase "has the entitlement to". This phrase conveys the same meaning that someone has the proper and legitimate authority to something. Another option is "holds the privilege of"; this phrase is especially useful when referring to something that is considered a privilege or a special advantage. Additionally, "possesses the authority to" is another option that conveys a sense of someone having power or control over a situation. Finally, "is entitled to" is another synonym for "hath right to" that is frequently used and understood.