Ulmus alata vs elm

Ulmus alata and elm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ulmus alata	Yes	No	No	No
elm	Yes	No	No	No

As nouns, elm is a hypernym of Ulmus alata; that is, elm is a word with a broader meaning than Ulmus alata:

Ulmus alata: North American elm having twigs and young branches with prominent corky projections
elm: any of various trees of the genus Ulmus: important timber or shade trees

Other hypernyms of Ulmus alata include elm tree.

Ulmus alata (noun)	elm (noun)
North American elm having twigs and young branches with prominent corky projections	any of various trees of the genus Ulmus: important timber or shade trees
	hard tough wood of an elm tree; used for e.g. implements and furniture