Other forms: evangelists
An evangelist is a preacher, specifically a Christian preacher. Evangelists are excited to tell everyone all over the world about Christianity.
If you're an evangelist, you're a Christian preacher. Unlike other religious words — such as prayer and God — this word is specifically limited to the Christian faith. With a capital e, Evangelist refers specifically to the authors of the Gospels in the New Testament. Sometimes the word is used more loosely when people say someone is an evangelist for a cause, such as vegetarianism or health care: that means they're a strong believer in and proponent of the cause.