needlewood vs shrub

needlewood and shrub both are nouns.

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

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

needlewood: large bushy shrub with pungent pointed leaves and creamy white flowers; central and eastern Australia
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of needlewood include bush.

needlewood (noun)	shrub (noun)
large bushy shrub with pungent pointed leaves and creamy white flowers; central and eastern Australia	a low woody perennial plant usually having several major stems