Ultramontanism is a word used to describe a certain type of Catholicism that emphasizes the authority of the Pope and places strong emphasis on hierarchy and tradition. It is a word that is often used to describe conservative Catholicism, and has been associated with resistance to modernism and change within the Church. If you are looking for synonyms for the word Ultramontanism, you might consider variations such as Papalism, Romanism, or Vaticanism. These words all carry similar connotations of a strict adherence to Catholic doctrine, and a prioritization of the authority of the Pope and the Vatican in matters of faith and practice.