witch elm vs Ulmus glabra

witch elm and Ulmus glabra both are nouns.

Word	Noun	Adjective	Verb	Adverb
witch elm	Yes	No	No	No
Ulmus glabra	Yes	No	No	No

As nouns, witch elm and Ulmus glabra are synonyms defined as:

Other synonyms of witch elm include wych elm.

witch elm (noun)	Ulmus glabra (noun)
Eurasian elm often planted as a shade tree	Eurasian elm often planted as a shade tree