Those seeking a native vocabulary for modern witchery could do worse than to look North.
In Early Modern times, the sabbat was known in Scandinavia as (to translate into English cognates) the witch-thing—a suitably Nordic name for the witches' assembly.
(Modern Witchery's mixed origins are readily revealed by its mixed vocabulary. Sabbat, originally a Hebrew word, is an etic—outsider's—name opprobriously applied to a gathering also known as the “synagogue of Satan.”)
The Norse term thing—as in althing—best preserves the word's original sense: “a meeting, an assembly.” Back in old tribal days, that's what it meant in English, too. A witch-thing is thus a “witch-meeting,” a “witch-assembly”: a suitably objective term for a gathering of witches.
(Contemporary use of the word sabbat to mean a witch's holiday—as in "the Eight Sabbats"—is a derived sense, extending the name of the gathering itself to the occasion for the gathering. Clearly, such an extended usage is not suitable to witch-thing.)
Exactly how English's old word for “assembly” came to take on its current sense of “item, entity,” is not entirely clear. (Perhaps because things gather to deal with things.) Plainly, the word has had something of a roundabout journey over the course of the last 1000 years.
Witch-thing reads rather humorously to the contemporary English ear, but—be it admitted—not inaptly so. Little is more characteristic of Witching than the Sabbat.