bush lawyer vs bramble bush

bush lawyer and bramble bush both are nouns.

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

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

bush lawyer: 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

bush lawyer (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