Tribulus terestris vs suffrutex

Tribulus terestris and suffrutex both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tribulus terestris	Yes	No	No	No
suffrutex	Yes	No	No	No

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

Tribulus terestris: tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed
suffrutex: low-growing woody shrub or perennial with woody base

Other hypernyms of Tribulus terestris include subshrub.

Tribulus terestris (noun)	suffrutex (noun)
tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed	low-growing woody shrub or perennial with woody base