sage brush vs suffrutex

sage brush and suffrutex both are nouns.

Word	Noun	Adjective	Verb	Adverb
sage brush	Yes	No	No	No
suffrutex	Yes	No	No	No

As nouns, suffrutex is a hypernym of sage brush; that is, suffrutex is a word with a broader meaning than sage brush:

sage brush: any of several North American composite subshrubs of the genera Artemis or Seriphidium
suffrutex: low-growing woody shrub or perennial with woody base

Other hypernyms of sage brush include subshrub.

sage brush (noun)	suffrutex (noun)
any of several North American composite subshrubs of the genera Artemis or Seriphidium	low-growing woody shrub or perennial with woody base