flora vs brushwood

flora and brushwood both are nouns.

Word	Noun	Adjective	Verb	Adverb
flora	Yes	No	No	No
brushwood	Yes	No	No	No

As nouns, brushwood is a hyponym of flora; that is, brushwood is a word with a more specific, narrower meaning than flora:

flora (noun)	brushwood (noun)
(botany) a living organism lacking the power of locomotion	a dense growth of bushes
all the plant life in a particular region or period	the wood from bushes or small branches