Ecumenism
Ecumenism ( ih-KEW-mə-niz-əm; alternatively spelled oecumenism) – also called interdenominationalism, or ecumenicalism – is the concept and principle that Christians who belong to different Christian denominations and theological traditions should work together to develop closer relationships among their churches and promote Christian unity. The adjective ecumenical is thus applied to any inter-denominational initiative which encourages greater cooperation and union among Christian denominations and churches.