Synonyms for "royal marriage" could include princely wedding, regal union, noble nuptials, monarchal matrimony, aristocratic alliance, sovereign ceremony, imperial espousal, majestic merger, kingly knot, dignified wedding, or elevated union. These synonyms all convey the idea of a marriage between individuals belonging to a royal or noble family. The term "royal marriage" is often used to refer to a high-profile wedding involving members of a royal family, such as the recent union of Prince Harry and Meghan Markle, but it can also simply mean any marriage between royalty. The use of synonyms adds variety and emphasis to writing and can help to avoid repetitive language.