Ononis repens vs suffrutex

Ononis repens and suffrutex both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ononis repens	Yes	No	No	No
suffrutex	Yes	No	No	No

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

Ononis repens: European woody plant having pink flowers and unifoliate leaves and long tough roots; spreads by underground runners
suffrutex: low-growing woody shrub or perennial with woody base

Other hypernyms of Ononis repens include subshrub.

Ononis repens (noun)	suffrutex (noun)
European woody plant having pink flowers and unifoliate leaves and long tough roots; spreads by underground runners	low-growing woody shrub or perennial with woody base