Siberian elm vs Chinese elm

Siberian elm and Chinese elm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Siberian elm	Yes	No	No	No
Chinese elm	Yes	No	No	No

As nouns, Siberian elm and Chinese elm are synonyms defined as:

Siberian elm and Chinese elm: fast-growing shrubby Asian tree naturalized in United States for shelter or ornament

Other synonyms of Siberian elm include dwarf elm, Ulmus pumila.

Siberian elm (noun)	Chinese elm (noun)
fast-growing shrubby Asian tree naturalized in United States for shelter or ornament	small fast-growing tree native to Asia; widely grown as shelterbelts and hedges
	fast-growing shrubby Asian tree naturalized in United States for shelter or ornament