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".