northern oriole vs oriole

northern oriole and oriole both are nouns.

Word	Noun	Adjective	Verb	Adverb
northern oriole	Yes	No	No	No
oriole	Yes	No	No	No

As nouns, oriole is a hypernym of northern oriole; that is, oriole is a word with a broader meaning than northern oriole:

Other hypernyms of northern oriole include American oriole, New World oriole.

northern oriole (noun)	oriole (noun)
a kind of New World oriole	American songbird; male is black and orange or yellow
	mostly tropical songbird; the male is usually bright orange and black