greylag goose vs graylag goose

greylag goose and graylag goose both are nouns.

Word	Noun	Adjective	Verb	Adverb
greylag goose	Yes	No	No	No
graylag goose	Yes	No	No	No

As nouns, greylag goose and graylag goose are synonyms defined as:

greylag goose and graylag goose: common grey wild goose of Europe; ancestor of many domestic breeds

Other synonyms of greylag goose include Anser anser, graylag, greylag.

greylag goose (noun)	graylag goose (noun)
common grey wild goose of Europe; ancestor of many domestic breeds	common grey wild goose of Europe; ancestor of many domestic breeds