American oriole vs New World oriole

American oriole and New World oriole both are nouns.

Word	Noun	Adjective	Verb	Adverb
American oriole	Yes	No	No	No
New World oriole	Yes	No	No	No

As nouns, American oriole and New World oriole are synonyms defined as:

American oriole and New World oriole: American songbird; male is black and orange or yellow

Other synonyms of American oriole include oriole.

American oriole (noun)	New World oriole (noun)
American songbird; male is black and orange or yellow	American songbird; male is black and orange or yellow