graylag vs Anser anser

graylag and Anser anser both are nouns.

Word	Noun	Adjective	Verb	Adverb
graylag	Yes	No	No	No
Anser anser	Yes	No	No	No

As nouns, graylag and Anser anser are synonyms defined as:

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

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

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