Chinese elm vs Siberian elm

Chinese elm and Siberian elm both are nouns.

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

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

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

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

Chinese elm (noun)	Siberian elm (noun)
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
fast-growing shrubby Asian tree naturalized in United States for shelter or ornament