elmwood vs elm tree

elmwood and elm tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
elmwood	Yes	No	No	No
elm tree	Yes	No	No	No

elmwood (noun)	elm tree (noun)
hard tough wood of an elm tree; used for e.g. implements and furniture	any of various trees of the genus Ulmus: important timber or shade trees