avens vs suffrutex

avens and suffrutex both are nouns.

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

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

avens: any of various perennials of the genus Geum having usually pinnate basal leaves and variously colored flowers
suffrutex: low-growing woody shrub or perennial with woody base

Other hypernyms of avens include subshrub.

avens (noun)	suffrutex (noun)
any of various perennials of the genus Geum having usually pinnate basal leaves and variously colored flowers	low-growing woody shrub or perennial with woody base