apostate

an apostate Roman Catholic.

An apostate from the faith, a heretic or a schismatic incurs a latae sententiae excommunication [...

He was labeled an apostate by his former religious community.

The apostate was excommunicated from the church.

She was accused of being an apostate for questioning the beliefs of her family.

The apostate renounced his former political party and joined a new one.

The king feared that the apostate noble would incite rebellion.

The apostate's family disowned him after he publicly denounced their religion.

The apostate's actions were seen as a betrayal by his former allies.

She felt like an apostate when she no longer believed in the principles of her childhood faith.

The apostate's writings were banned by the religious authorities.

He was ostracized from the community for being an apostate.