interreligious

in·ter·re·li·gious

I5216950 (ĭn′tər-rĭ-lĭj′əs)adj. Of, relating to, involving, or representing different religions: "The pope's remarks seemed aimed at pushing more theoretical interreligious conversations into the practical realm" (Rachel Donadio).
[inter- + religious.]

interreligious

(ˌɪntərɪˈlɪdʒəs) adjconducted, involving, or existing between two or more religious groups or movements