I found "bserossijskij sunod" and I know that sunod is an old russian word for synod. Today it seems to be sinod. But what does that "bserossijskij" mean?
I think you (or your-source) misspelled it
it should be Всероссийский. Not Б but В.
meaning all-Russian, Russia-wide
another option, your source used Latin glyphs similar to Cyrillic glyphs.
like "u" is similar to "и" and capital "b" - "B" is same as capital "в" - "В"