Hush-hush and Out-of-the-way

Hush-hush adjective - Not known or meant to be known by the general populace.

Out-of-the-way and hush-hush are semantically related. In some cases you can use "Out-of-the-way" instead an adjective phrase "Hush-hush".

Out-of-the-way adjective - Different from the ordinary in a way that causes curiosity or suspicion.

Hush-hush and out-of-the-way are semantically related. Sometimes you can use "Hush-hush" instead an adjective phrase "Out-of-the-way".