brushwood vs copse

brushwood and copse both are nouns.

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

As nouns, brushwood and copse are synonyms defined as:

Other synonyms of brushwood include brush, coppice, thicket.

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