Scientologynoun [ U ]
/ˌsaɪ.ənˈtɒl.ə.dʒi//ˌsaɪ.ənˈtɑː.lə.dʒi/a religious system created by the American author L. Ron Hubbard that is based on a search for self-knowledge by following a course of study and training
Scientologist
noun [ C ] /ˌsaɪ.ənˈtɒl.ə.dʒɪst//ˌsaɪ.ənˈtɑː.lə.dʒɪst/
The actor became a Scientologist.