So I knew that "church" is "kos'ciol" (or something like that) in Polish and learned that it's "kostol" in Slovak, but didn't know that there was a similar word in Russian until I heard it today.
When I asked about the difference between "cerkov'" and "kostyol", I was told that the former is Orthodox while the latter is used, for example, for Catholic churches. And they volunteered the information that Hindus (for example) have "khram". I asked about Jews and Moslems and was told "sinagog" and "mechet'".
So! "Kostyol" in Russian. Interesting.