Yes, sola scriptura is the same, the belief in the authority of scriptures is the same amongst many if not most Protestant Churches. I'm using Lutheranism and Calvinism as examples of extremes of doctrine that can result.
Different lexicon. We don't speak the same language.
You both speak English, both hold that "scripture has authority." What you're saying, in my view, is that even that phrase is subject to interpretation.
I meant, that you and I don't speak the same language. Some other Protestants have a different view on silence in Scripture and adiaphora. I can't help that. Some differ in worship practices.