European sea eagle vs gray sea eagle

European sea eagle and gray sea eagle both are nouns.

Word	Noun	Adjective	Verb	Adverb
European sea eagle	Yes	No	No	No
gray sea eagle	Yes	No	No	No

As nouns, European sea eagle and gray sea eagle are synonyms defined as:

European sea eagle and gray sea eagle: bulky greyish-brown eagle with a short wedge-shaped white tail; of Europe and Greenland

Other synonyms of European sea eagle include ern, erne, grey sea eagle, Haliatus albicilla, white-tailed sea eagle.

European sea eagle (noun)	gray sea eagle (noun)
bulky greyish-brown eagle with a short wedge-shaped white tail; of Europe and Greenland	bulky greyish-brown eagle with a short wedge-shaped white tail; of Europe and Greenland