German tamarisk vs shrub

German tamarisk and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
German tamarisk	Yes	No	No	No
shrub	Yes	No	No	No

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

Other hypernyms of German tamarisk include bush.

German tamarisk (noun)	shrub (noun)
Eurasian shrub resembling the tamarisk	a low woody perennial plant usually having several major stems