Bucephela clangula vs goldeneye

Bucephela clangula and goldeneye both are nouns.

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

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

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

Other synonyms of Bucephela clangula include whistler.

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