gray sea eagle vs erne

gray sea eagle and erne both are nouns.

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

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

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

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

gray sea eagle (noun)	erne (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