Ern and Sea eagle

Ern noun - Bulky greyish-brown eagle with a short wedge-shaped white tail; of Europe and Greenland.

Sea eagle and ern are semantically related. In some cases you can use "Sea eagle" instead a noun "Ern".

Sea eagle noun - Large harmless hawk found worldwide that feeds on fish and builds a bulky nest often occupied for years.

Ern and sea eagle are semantically related. Sometimes you can replace term "Ern" with "Sea eagle", this terms are similar.