needle bush vs needle-bush

needle bush and needle-bush both are nouns.

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

As nouns, needle bush and needle-bush are synonyms defined as:

needle bush and needle-bush: shrub with pungent rigid needle-shaped leaves and white flowers; eastern Australia

Other synonyms of needle bush include Hakea lissosperma, needlebush.

needle bush (noun)	needle-bush (noun)
shrub with pungent rigid needle-shaped leaves and white flowers; eastern Australia	shrub with pungent rigid needle-shaped leaves and white flowers; eastern Australia