bladder senna vs shrub

bladder senna and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
bladder senna	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of bladder senna; that is, shrub is a word with a broader meaning than bladder senna:

bladder senna: yellow-flowered European shrub cultivated for its succession of yellow flowers and very inflated bladdery pods and as a source of wildlife food
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of bladder senna include bush.

bladder senna (noun)	shrub (noun)
yellow-flowered European shrub cultivated for its succession of yellow flowers and very inflated bladdery pods and as a source of wildlife food	a low woody perennial plant usually having several major stems