fishing eagle vs sea eagle

fishing eagle and sea eagle both are nouns.

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

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

fishing eagle (noun)	sea eagle (noun)
of southeast Europe and central Asia	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