brier patch vs flora

brier patch and flora both are nouns.

Word	Noun	Adjective	Verb	Adverb
brier patch	Yes	No	No	No
flora	Yes	No	No	No

As nouns, flora is a hypernym of brier patch; that is, flora is a word with a broader meaning than brier patch:

Other hypernyms of brier patch include botany, vegetation.

brier patch (noun)	flora (noun)
tangled mass of prickly plants	(botany) a living organism lacking the power of locomotion
	all the plant life in a particular region or period