western tanager vs tanager

western tanager and tanager both are nouns.

Word	Noun	Adjective	Verb	Adverb
western tanager	Yes	No	No	No
tanager	Yes	No	No	No

As nouns, tanager is a hypernym of western tanager; that is, tanager is a word with a broader meaning than western tanager:

western tanager: of western North America; male is black and yellow and orange-red
tanager: any of numerous New World woodland birds having brightly colored males

western tanager (noun)	tanager (noun)
of western North America; male is black and yellow and orange-red	any of numerous New World woodland birds having brightly colored males