white-tailed sea eagle vs gray sea eagle

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

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

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

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

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

white-tailed 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