Siberian elm vs Ulmus pumila

Siberian elm and Ulmus pumila both are nouns.

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

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

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

Other synonyms of Siberian elm include Chinese elm, dwarf elm.

Siberian elm (noun)	Ulmus pumila (noun)
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