blackwood tree vs blackwood

blackwood tree and blackwood both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackwood tree	Yes	No	No	No
blackwood	Yes	No	No	No

As nouns, blackwood tree and blackwood are synonyms defined as:

blackwood tree and blackwood: any of several hardwood trees yielding very dark-colored wood

blackwood tree (noun)	blackwood (noun)
any of several hardwood trees yielding very dark-colored wood	any of several hardwood trees yielding very dark-colored wood
	very dark wood of any of several blackwood trees