goldeneye vs Bucephela clangula

goldeneye and Bucephela clangula both are nouns.

Word	Noun	Adjective	Verb	Adverb
goldeneye	Yes	No	No	No
Bucephela clangula	Yes	No	No	No

As nouns, goldeneye and Bucephela clangula are synonyms defined as:

goldeneye and Bucephela clangula: large-headed swift-flying diving duck of Arctic regions

Other synonyms of goldeneye include whistler.

goldeneye (noun)	Bucephela clangula (noun)
large-headed swift-flying diving duck of Arctic regions	large-headed swift-flying diving duck of Arctic regions
a variety of green lacewing