What is the term for someone who has changed their religious beliefs to accept a different or new religion?

Being saved from sin is known as:

Someone who tries to convert others to believe in a particular religion is known as a ________.

A Christian sacrament in which bread and wine are consumed to remember Jesus's Last Supper is known as:

The Christian sacrament that makes a person a member of the Christian church is called ________.

In Christian belief, Jesus's rise from the dead is known as:

A sacred rite or ritual of Christian churches is referred to as a ________.