dwarf elm vs Chinese elm

dwarf elm and Chinese elm both are nouns.

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

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

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

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

dwarf 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