On matters of theology, we simply say Catholic. No, we don’t mean you guys.
On matters of liturgy, we speak of the Roman Rite, Roman Missal, etc.
Well guess what? You guys no longer get to claim sole ownership of the words "church" or "catholic". Semantic games like in the Catechism where other Christian assemblies are called "ecclesial communities" and only you guys can be "the Church", no longer pass the smell test. Maybe centuries ago when Rome grasped the temporal power to control everything in Christendom, but no more. ESPECIALLY in light of the revelations coming out concerning the sexual abuse scandals.
"Catholic" was an adjective that meant "of the whole" or "universal". The Vincentian Canon was the fifth century threefold test of catholicity - was it believed always, everywhere and by all. Though it may have in the early centuries, Roman Catholicism today doesn't qualify - no matter how much they stomp their feet and scream.