Ulmus laevis vs water elm

Ulmus laevis and water elm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ulmus laevis	Yes	No	No	No
water elm	Yes	No	No	No

As nouns, Ulmus laevis and water elm are synonyms defined as:

Ulmus laevis and water elm: Eurasian elm closely resembling the American elm; thrives in a moist environment

Ulmus laevis (noun)	water elm (noun)
Eurasian elm closely resembling the American elm; thrives in a moist environment	large ornamental tree with graceful gradually spreading branches common in eastern North America
	Eurasian elm closely resembling the American elm; thrives in a moist environment