Cubbyhole and Den

Cubbyhole noun - A small compartment.

Den is a synonym for cubbyhole in cubicle topic. In some cases you can use "Den" instead a noun "Cubbyhole".

Den noun - The shelter or resting place of a wild animal.

Cubbyhole is a synonym for den in study topic. You can use "Cubbyhole" instead a noun "Den", if it concerns topics such as cavern, sanctum.