1) Ceremoniously 2) Grandly 3) How a host treats the Queen 4) Imperially 5) Imposingly 6) In a big, big way 7) In a royal manner 8) Like kings 9) Majestically 10) Nobly 11) Quite Found on https://www.crosswordclues.com/clue/royally
Roy'al·ly adverb In a royal or kingly manner; like a king; as becomes a king. « His body shall be royally interred.» Dryden. Found on http://www.encyclo.co.uk/webster/R/100