Branta leucopsis vs barnacle goose

Branta leucopsis and barnacle goose both are nouns.

Word	Noun	Adjective	Verb	Adverb
Branta leucopsis	Yes	No	No	No
barnacle goose	Yes	No	No	No

As nouns, Branta leucopsis and barnacle goose are synonyms defined as:

Branta leucopsis and barnacle goose: European goose smaller than the brant; breeds in the far north

Other synonyms of Branta leucopsis include barnacle.

Branta leucopsis (noun)	barnacle goose (noun)
European goose smaller than the brant; breeds in the far north	European goose smaller than the brant; breeds in the far north