Extraneous and Out-of-the-way

Extraneous adjective - Not being a vital part of or belonging to something.

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

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

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