Huntingdon elm vs elm

Huntingdon elm and elm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Huntingdon elm	Yes	No	No	No
elm	Yes	No	No	No

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

Huntingdon elm: erect vigorous hybrid ornamental elm tree
elm: any of various trees of the genus Ulmus: important timber or shade trees

Other hypernyms of Huntingdon elm include elm tree.

Huntingdon elm (noun)	elm (noun)
erect vigorous hybrid ornamental elm tree	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