Acer negundo vs box elder

Acer negundo and box elder both are nouns.

Word	Noun	Adjective	Verb	Adverb
Acer negundo	Yes	No	No	No
box elder	Yes	No	No	No

As nouns, Acer negundo and box elder are synonyms defined as:

Acer negundo and box elder: common shade tree of eastern and central United States

Other synonyms of Acer negundo include ash-leaved maple.

Acer negundo (noun)	box elder (noun)
common shade tree of eastern and central United States	common shade tree of eastern and central United States