tumbleweed vs shrub

tumbleweed and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
tumbleweed	Yes	No	No	No
shrub	Yes	No	No	No

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

tumbleweed: bushy annual weed of central North America having greenish flowers and winged seeds
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of tumbleweed include bush.

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

tumbleweed: prickly bushy Eurasian plant; a troublesome weed in central and western United States
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of tumbleweed include bush.

tumbleweed (noun)	shrub (noun)
any plant that breaks away from its roots in autumn and is driven by the wind as a light rolling mass	a low woody perennial plant usually having several major stems
bushy annual weed of central North America having greenish flowers and winged seeds
bushy plant of western United States
prickly bushy Eurasian plant; a troublesome weed in central and western United States