Back room and Backdoor

Back room noun - A room located in the rear of an establishment; usually accessible only to privileged groups.

Backdoor and back room are semantically related. In some cases you can use "Backdoor" instead an adjective phrase "Back room".

Backdoor noun - An entrance at the rear of a building.

Back room and backdoor are semantically related. Sometimes you can replace phrase "Back room" with "Backdoor", this terms are similar.