Coordinate term: proselytize
To preach any ideology to those who have not yet been converted to it.
To be enthusiastic about something, and to attempt to share that enthusiasm with others; to promote.
To tell people about (a particular branch of) Christianity, especially in order to convert them; to preach the gospel to.
Hypernym: proselytize
To proselytize.
One who has converted to a religion or doctrine, especially a gentile converted to Judaism.