Ecclesiastic

Adjective

 * 1) Of or pertaining to the church; ecclesiastical.

Noun

 * 1) One who adheres to a church-based philosophy.

Thesaurus
DD, Doctor of Divinity, Holy Joe, abbe, chaplain, churchman, clergyman, cleric, clerical, clerk, curate, cure, divine, man of God, military chaplain, minister, padre, parson, pastor, preacher, rector, reverend, servant of God, shepherd, sky pilot, supply clergy, supply minister, the Reverend, the very Reverend, tonsured cleric

Etymology
From ecclesia:, originally from  ἐκκλησία: