proselytation
/ˌprɒsɪlʌɪˈteɪʃn/rare
noun
The action or process of seeking to convert someone from one opinion, religion, party, etc., to another; proselytizing.
Origin
Mid 19th century; earliest use found in George Faber (1773–1854), Church of England clergyman and religious writer. From proselyte + -ation.