Circumpolar and Hyperborean

Circumpolar adjective - Located or found throughout a polar region.

Hyperborean and circumpolar are semantically related. In some cases you can use "Hyperborean" instead an adjective "Circumpolar".

Hyperborean noun - (Greek mythology) one of a people that the ancient Greeks believed lived in a warm and sunny land north of the source of the north wind.

Circumpolar and Hyperborean are semantically related. You can use "Circumpolar" instead an adjective "Hyperborean".