ern vs sea eagle

ern and sea eagle both are nouns.

Word	Noun	Adjective	Verb	Adverb
ern	Yes	No	No	No
sea eagle	Yes	No	No	No

As nouns, sea eagle is a hypernym of ern; that is, sea eagle is a word with a broader meaning than ern:

ern: bulky greyish-brown eagle with a short wedge-shaped white tail; of Europe and Greenland
sea eagle: any of various large eagles that usually feed on fish

ern (noun)	sea eagle (noun)
bulky greyish-brown eagle with a short wedge-shaped white tail; of Europe and Greenland	any of various large eagles that usually feed on fish
	large harmless hawk found worldwide that feeds on fish and builds a bulky nest often occupied for years