Out-of-the-way and Under cover

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

Under cover and out-of-the-way are semantically related In some cases you can replace phrase "Under cover" with "Out-of-the-way", this phrases are similar.

Out-of-the-way and under cover are semantically related in hidden topic. Sometimes you can use "Out-of-the-way" instead an adjective phrase "Under cover".