Cassia augustifolia vs true senna

Cassia augustifolia and true senna both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cassia augustifolia	Yes	No	No	No
true senna	Yes	No	No	No

As nouns, Cassia augustifolia and true senna are synonyms defined as:

Cassia augustifolia and true senna: erect shrub having racemes of tawny yellow flowers; the dried leaves are used medicinally as a cathartic; sometimes placed in genus Cassia

Cassia augustifolia (noun)	true senna (noun)
erect shrub having racemes of tawny yellow flowers; the dried leaves are used medicinally as a cathartic; sometimes placed in genus Cassia	erect shrub having racemes of tawny yellow flowers; the dried leaves are used medicinally as a cathartic; sometimes placed in genus Cassia