needle-bush vs shrub

needle-bush and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
needle-bush	Yes	No	No	No
shrub	Yes	No	No	No

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

needle-bush: shrub with pungent rigid needle-shaped leaves and white flowers; eastern Australia
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of needle-bush include bush.

needle-bush (noun)	shrub (noun)
shrub with pungent rigid needle-shaped leaves and white flowers; eastern Australia	a low woody perennial plant usually having several major stems