gray sea eagle vs white-tailed sea eagle

gray sea eagle and white-tailed sea eagle both are nouns.

Word	Noun	Adjective	Verb	Adverb
gray sea eagle	Yes	No	No	No
white-tailed sea eagle	Yes	No	No	No

As nouns, gray sea eagle and white-tailed sea eagle are synonyms defined as:

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

Other synonyms of gray sea eagle include ern, erne, European sea eagle, grey sea eagle, Haliatus albicilla.

gray sea eagle (noun)	white-tailed 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