Far northern and Hyperborean

Hyperborean and far northern are semantically related. In some cases you can use "Hyperborean" instead an adjective phrase "Far northern".

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.

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