slippery elm vs red elm

slippery elm and red elm both are nouns.

Word	Noun	Adjective	Verb	Adverb
slippery elm	Yes	No	No	No
red elm	Yes	No	No	No

As nouns, slippery elm and red elm are synonyms defined as:

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

Other synonyms of slippery elm include Ulmus rubra.

slippery elm (noun)	red elm (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
	autumn-flowering elm of southeastern United States