Out-of-the-way and Undercover

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

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

Undercover adjective - Undertaken or done so as to escape being observed or known by others.

Out-of-the-way and undercover are semantically related. Sometimes you can use "Out-of-the-way" instead an adjective "Undercover".