goldfinch vs Spinus tristis

goldfinch and Spinus tristis both are nouns.

Word	Noun	Adjective	Verb	Adverb
goldfinch	Yes	No	No	No
Spinus tristis	Yes	No	No	No

As nouns, goldfinch and Spinus tristis are synonyms defined as:

goldfinch and Spinus tristis: American finch whose male has yellow body plumage in summer

Other synonyms of goldfinch include New World goldfinch, yellowbird.

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