Other forms: exorcisms
A kid who's having an hour-long screaming temper tantrum probably needs either an exorcism or a nap. You can use the noun exorcism to describe getting rid of evil spirits.
Exorcism, when it's used literally to mean evicting bad spirits, is a religious term. Plenty of horror movies feature a priest performing the ritual of exorcism on a demonically possessed person, and some version of exorcism really does exist in Catholic, Muslim, Hindu, and Jewish traditions. The word can also be used as a metaphor for getting rid of something negative: "Finally telling you the truth felt like an exorcism."