Extraneous and Open-air

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

Open-air and extraneous are semantically related In some cases you can use "Open-air" instead an adjective "Extraneous".

Open-air adjective - Of, relating to, or held in the open air.

Extraneous and open-air are semantically related in external topic. Sometimes you can use "Extraneous" instead an adjective phrase "Open-air".