Right Honourable is a title used to refer to members of the British Parliament, senior judges, and other high-ranking officials. However, if you are looking to add a bit of variety to your vocabulary, there are a few synonyms you can use. One alternative is the phrase "noble and dignified," which carries a similar sense of respect and importance. Other options include "esteemed" or "respected," which both denote a high level of regard. Alternatively, "exalted" or "august" can also be used to convey a sense of awe and reverence. Whatever word you choose, use it with care and thoughtfulness when addressing those in positions of authority.