brushwood vs coppice

brushwood and coppice both are nouns.

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

As nouns, brushwood and coppice are synonyms defined as:

Other synonyms of brushwood include brush, copse, thicket.

brushwood (noun)	coppice (noun)
a dense growth of bushes	a dense growth of bushes
the wood from bushes or small branches