wild quinine vs subshrub

wild quinine and subshrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild quinine	Yes	No	No	No
subshrub	Yes	No	No	No

As nouns, subshrub is a hypernym of wild quinine; that is, subshrub is a word with a broader meaning than wild quinine:

wild quinine: stout perennial herb of the eastern United States with whitish flowers; leaves traditionally used by Catawba Indians to treat burns
subshrub: low-growing woody shrub or perennial with woody base

Other hypernyms of wild quinine include suffrutex.

wild quinine (noun)	subshrub (noun)
stout perennial herb of the eastern United States with whitish flowers; leaves traditionally used by Catawba Indians to treat burns	low-growing woody shrub or perennial with woody base