Exorcism
In Christianity, exorcism is the practice of casting out demons. In Christian practice the person performing the exorcism, known as an exorcist, is often a member of the Christian Church, or an individual thought to be graced with special powers or skills. The exorcist may use prayers and religious material, such as set formulas, gestures, symbols, icons, amulets, etc. The exorcist often invokes God, Jesus and/or several different angels and archangels to intervene with the exorcism. Protestant Christian exorcists most commonly believe the authority given to them by the Father, Son, and Holy Spirit (the Trinity) is the source of their ability to cast out demons.
Deliverance ministry
Though many people confuse deliverance with exorcism, they are not the same. Exorcisms are carried out through the use of various rituals of exorcism, such as the Roman Ritual, and often utilize attendant sacramentals such as holy water, while deliverance involves the ongoing counseling of the individual through various programs.