👉 Interchurch refers to a situation where two or more religious groups, including churches, synagogues, mosques, temples, and other religious institutions, come together to worship together. This can be referred to as a "religious union," which is an institution that combines different religious beliefs and practices under one roof. The term "interchurch" was coined in the late 20th century by sociologist Mary Ellen Pomerantz in her book "Interfaith Relations: A Study of Interfaith Relations