Behind-the-scenes and Backroom

Behind-the-scenes adjective - Not known or meant to be known by the general populace.

Backroom and behind-the-scenes are semantically related. In some cases you can use "Backroom" instead an adjective phrase "Behind-the-scenes".

Backroom noun - The meeting place of a group of leaders who make their decisions via private negotiations.

Behind-the-scenes and backroom are semantically related. Sometimes you can replace phrase "Behind-the-scenes" with "Backroom", this terms are similar.