Here, according to Maine's own raven_starsong3, is the surprising answer:
"Pagan groups in general are taking the title of Church for two reasons. First, they may be trying to achieve mainstream and/or legal recognition as a body equal to a Christian or other religion's church.______________________
"Second, the word 'church' is actually a Romanized version of the Celtic word 'circe' which is what the Pagans in the British Isles called their groups.
Circe means a circle or group practicing religion as a community. The Celts pronounced it KER'ka, but the Romans pronounced it CHER'cha and took it back to Rome where it became associated with the Christian religion.
There is a movement to 'take the word back.'"
Thnx to blueheron for the foto; go HERE to see more.