chaffweed vs suffrutex

chaffweed and suffrutex both are nouns.

Word	Noun	Adjective	Verb	Adverb
chaffweed	Yes	No	No	No
suffrutex	Yes	No	No	No

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

Other hypernyms of chaffweed include subshrub.

chaffweed (noun)	suffrutex (noun)
weedy plant having short dry chafflike leaves	low-growing woody shrub or perennial with woody base