slippery elm vs Ulmus rubra

slippery elm and Ulmus rubra both are nouns.

Word	Noun	Adjective	Verb	Adverb
slippery elm	Yes	No	No	No
Ulmus rubra	Yes	No	No	No

As nouns, slippery elm and Ulmus rubra are synonyms defined as:

slippery elm and Ulmus rubra: North American elm having rough leaves that are red when opening; yields a hard wood

Other synonyms of slippery elm include red elm.

slippery elm (noun)	Ulmus rubra (noun)
North American elm having rough leaves that are red when opening; yields a hard wood	North American elm having rough leaves that are red when opening; yields a hard wood