Exorcist (noun)

1. A religious official, such as a priest, authorized to perform the rite of exorcism.
2. A person who performs exorcisms as part of their religious or spiritual beliefs.
3. A person who practices or claims to practice the expulsion of evil spirits from a person or object.

Origin:

From late latin exorcista, from greek exorkistēs, from exorkizein ("to exorcise"), from ex- ("out") + horkos ("oath, curse").

Examples:

1. The exorcist performed the ritual to cast out the demon from the possessed person.
2. He sought out the help of an experienced exorcist to rid his home of evil spirits.
3. The exorcist was known for his successful exorcisms and had a reputation for being one of the best.
4. The local priest had trained as an exorcist in order to help those in need.
5. The young woman sought out the help of an exorcist after she started to experience strange and frightening events.