dwarf elm vs Siberian elm

dwarf elm and Siberian elm both are nouns.

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

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

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

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

dwarf elm (noun)	Siberian elm (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