propagator

UK
/ˈprɒp.ə.ɡeɪ.tə/
US
/ˈprɑː.pə.ˌɡeɪ.tɚ/

Examples

He was converted to Buddhism and at once became the devout propagator of that faith.

Il se convertit au bouddhisme et devint aussitôt le fervent propagateur de cette foi.