Senna obtusifolia vs suffrutex

Senna obtusifolia and suffrutex both are nouns.

Word	Noun	Adjective	Verb	Adverb
Senna obtusifolia	Yes	No	No	No
suffrutex	Yes	No	No	No

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

Senna obtusifolia: cosmopolitan tropical herb or subshrub with yellow flowers and slender curved pods; a weed; sometimes placed in genus Cassia
suffrutex: low-growing woody shrub or perennial with woody base

Other hypernyms of Senna obtusifolia include subshrub.

Senna obtusifolia (noun)	suffrutex (noun)
cosmopolitan tropical herb or subshrub with yellow flowers and slender curved pods; a weed; sometimes placed in genus Cassia	low-growing woody shrub or perennial with woody base