Ulmus carpinifolia vs elm

Ulmus carpinifolia and elm both are nouns.

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

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

Ulmus carpinifolia: European elm with lustrous smooth leaves used as an ornamental
elm: any of various trees of the genus Ulmus: important timber or shade trees

Other hypernyms of Ulmus carpinifolia include elm tree.

Ulmus carpinifolia (noun)	elm (noun)
European elm with lustrous smooth leaves used as an ornamental	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