consumption weed vs shrub

consumption weed and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
consumption weed	Yes	No	No	No
shrub	Yes	No	No	No

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

consumption weed: a shrub of salt marshes of eastern and south central North America and West Indies; fruit is surrounded with white plumelike hairy tufts
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of consumption weed include bush.

consumption weed (noun)	shrub (noun)
a shrub of salt marshes of eastern and south central North America and West Indies; fruit is surrounded with white plumelike hairy tufts	a low woody perennial plant usually having several major stems