What is the Latin word for exorcism?

The usual Latin words for “exorcism” are exorcismus, thĕurgĭa, Lactantius; also expulsiō. The right choice depends on the sense; see the distinctions below.

English → Latin

“exorcism” in Latin

exorcismusan exorcism thĕurgĭaa summoning of spirits LactantiusA masculine cognomen — famously held by expulsiōexpulsion (driving out)

The English word exorcism itself goes back to Latin exorcizō.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

exorcism

exorcismus (ecclesiastical, Tert.): theurgia (ecclesiastical, Augustin) or *daemonum expulsio (after daemonas expellere, Lactantius; expulsio, Cic.).

Quick answer

What is the Latin word for exorcism?: The usual Latin words for “exorcism” are exorcismus, thĕurgĭa, Lactantius; also expulsiō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.