barnacle vs barnacle goose

barnacle and barnacle goose both are nouns.

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

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

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

Other synonyms of barnacle include Branta leucopsis.

barnacle (noun)	barnacle goose (noun)
marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces	European goose smaller than the brant; breeds in the far north
European goose smaller than the brant; breeds in the far north