The old-time Tribe of Witches didn't have a separate word for “religion.”
Or “tradition.”
Or “morals.”
They had one word for them all.
The Hwicce—the Anglo-Saxon tribe (and later, kingdom) that (according to some) gave rise to the name and lore of today's witches—spoke their own dialect of Old English, the language which (after a crossbow marriage with Norman French) gave rise to Modern English.
Living in a state of cultural wholeness that we can only fantasize about today—what culture critic Stephen Flowers would call “integral culture”—their word ðéaw denoted many of the shared things that together make a people a people: Religion. Custom. Tradition. Usage. Virtue. Conduct. In the plural, it also meant virtues, (good) manners, morals, morality.
Imagine a world in which all these things were the same thing. That was the world of the witches.