Ulmus pumila vs Chinese elm

Ulmus pumila and Chinese elm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ulmus pumila	Yes	No	No	No
Chinese elm	Yes	No	No	No

As nouns, Ulmus pumila and Chinese elm are synonyms defined as:

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

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

Ulmus pumila (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