Not really. Even though the word "Catholic" means universal, but Catholics are pretty far from all-inclusive. Universalists seem to accept all religions and emphasize the basic underlying principals common with all.
Unitarian Universalist
Yes, Catholicism = Catholic religion.
Unitarian Universalist
Unitarian/Universalist
Florence Nightingale was a Universalist Christian
Lou Gehrig's ancestory is German; both of his parents were born in Germany. According to Jonathan Eig in his book Luckiest Man: "He (Lou) had not been raised on literature or even on the intellectual concepts connected with organized religion. There is no indication that he or his parents ever practiced as Lutherans."However, Gehrig was a parishioner of the Fourth Universalist Society of New York. So I presume he was a Universalist.I can't post links, but the Wikipedia article on the Fourth Universalist Society confirms this.
religion and spirituality
Roman Catholic AnswerYou can't compare them, they are the same thing.
No, Bell stated he was an agnostic. Some documents state he was Unitarian/Universalist.
Changing from one religion to another is called the same for any of them: conversion.
Roman Catholic AnswerYour question makes no sense, the Catholic IS the Christian religion, they are the same thing. Our separated brethern (the protestants) sometimes use the word, "Christian" to mean "not Catholic". This is beyond ridiculous, and rather bigoted.
Catholicism was the religion of the Catholic Reformation.