lawyer bush vs bramble bush

lawyer bush and bramble bush both are nouns.

Word	Noun	Adjective	Verb	Adverb
lawyer bush	Yes	No	No	No
bramble bush	Yes	No	No	No

As nouns, bramble bush is a hypernym of lawyer bush; that is, bramble bush is a word with a broader meaning than lawyer bush:

lawyer bush: stout-stemmed trailing shrub of New Zealand that scrambles over other growth
bramble bush: any prickly shrub of the genus Rubus bearing edible aggregate fruits

lawyer bush (noun)	bramble bush (noun)
stout-stemmed trailing shrub of New Zealand that scrambles over other growth	any prickly shrub of the genus Rubus bearing edible aggregate fruits