ecumenicist

[ ek-yoo-men-uh-sist or, esp. British, ee-kyoo- ]
/ ˌɛk yʊˈmɛn ə sɪst or, esp. British, ˌi kyʊ- /

noun

a person who advocates Christian ecumenicity.

Origin of ecumenicist

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019