Satanism

In this information vacuum, something had to feed the beast and, as Leveritt said, “Satanism beat skepticism.”
‘Paradise Lost 3: Purgatory’: Its Road to the Academy Awards|Lorenza Muñoz|February 22, 2012|DAILY BEAST
“Basically, you have to be a Christian to believe in Satanism because you have to believe in the Devil,” he said.
Witches Blast O'Donnell|Ben Crair|September 20, 2010|DAILY BEAST
We renounce idolatry, witchcraft, and Satanism in our land!
Rick Warren's Africa Problem|Max Blumenthal|January 7, 2009|DAILY BEAST
Satanism of the second division, its principles and its origin, will be described in the second chapter.
Devil-Worship in France|Arthur Edward Waite

Fava, bishop of Grenoble, with whose opinions upon Satanism in Masonry we have previously made acquaintance.
Devil-Worship in France|Arthur Edward Waite
All this is clearly outside the subject of Satanism, but it leads up, notwithstanding, to the discovery of M. Ricoux.
Devil-Worship in France|Arthur Edward Waite
“I will be the exploiter and not the accomplice of modern Satanism,” said the pious Doctor Bataille.
Devil-Worship in France|Arthur Edward Waite
It had besides a fin de sicle flavouring of Satanism and decadence.
The Inferno|August Strindberg

British Dictionary definitions for Satanism

Satanism

/ (ˈseɪtəˌnɪzəm) /

noun

the worship of Satan

a form of such worship which includes blasphemous or obscene parodies of Christian prayers, etc

a satanic disposition or satanic practices

Derived forms of Satanism

Satanist, noun, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012