Carduelis carduelis vs goldfinch

Carduelis carduelis and goldfinch both are nouns.

Word	Noun	Adjective	Verb	Adverb
Carduelis carduelis	Yes	No	No	No
goldfinch	Yes	No	No	No

As nouns, Carduelis carduelis and goldfinch are synonyms defined as:

Carduelis carduelis and goldfinch: small European finch having a crimson face and yellow-and-black wings

Carduelis carduelis (noun)	goldfinch (noun)
small European finch having a crimson face and yellow-and-black wings	small European finch having a crimson face and yellow-and-black wings
	American finch whose male has yellow body plumage in summer