narrow goldenrod vs goldenrod

narrow goldenrod and goldenrod both are nouns.

Word	Noun	Adjective	Verb	Adverb
narrow goldenrod	Yes	No	No	No
goldenrod	Yes	No	No	No

As nouns, goldenrod is a hypernym of narrow goldenrod; that is, goldenrod is a word with a broader meaning than narrow goldenrod:

narrow goldenrod: western American goldenrod with long narrow clusters of small yellow flowers
goldenrod: any of numerous chiefly summer-blooming and fall-blooming North American plants especially of the genus Solidago

narrow goldenrod (noun)	goldenrod (noun)
western American goldenrod with long narrow clusters of small yellow flowers	any of numerous chiefly summer-blooming and fall-blooming North American plants especially of the genus Solidago