Protestantize

[ prot-uh-stuh n-tahyz ]
/ ˈprɒt ə stənˌtaɪz /

verb (used with object), Prot·es·tant·ized, Prot·es·tant·iz·ing.

to convert or cause to conform to Protestantism.
Also especially British, Prot·es·tant·ise.

Origin of Protestantize

First recorded in 1825–35; Protestant + -ize