Royal

Of or relating to a monarch or their family.
Having the air or demeanour of a monarch; illustrious; magnanimous; of more than common size or excellence.
(nautical) In large sailing ships, of a mast right above the topgallant mast and its sails.
(boxing, military) Free-for-all, especially involving multiple combatants.
(informal) Used as an intensifier.

(of a monarch): kingly (of a king), monarchical, princely (of a prince), queenly (of a queen), regal
(having a monarch's air): majestic, stately, regal
(informal intensifier): major