Royalty rhymes with:
disloyalty, loyalty, admiralty, casualty, difficulty, disloyalty, faculty, fealty, loyalty, mayoralty, mcanulty, novelty, penalty, realty, specialty, subtlety, tumulty
Royalty sounds like:
railed, rallied, reality, realty, reeled, relate, related, relayed, relied, reload, reloaded, rheault, riled, rillette, roald, roiled, rolette, rolled, rollet, rollout, rolt, roulette, rowlett, rowlette, ruled