Chinese elm vs elm

Chinese elm and elm both are nouns.

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

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

Chinese elm: small fast-growing tree native to Asia; widely grown as shelterbelts and hedges
elm: any of various trees of the genus Ulmus: important timber or shade trees

Other hypernyms of Chinese elm include elm tree.

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

Chinese elm: fast-growing shrubby Asian tree naturalized in United States for shelter or ornament
elm: any of various trees of the genus Ulmus: important timber or shade trees

Other hypernyms of Chinese elm include elm tree.

Chinese elm (noun)	elm (noun)
small fast-growing tree native to Asia; widely grown as shelterbelts and hedges	any of various trees of the genus Ulmus: important timber or shade trees
fast-growing shrubby Asian tree naturalized in United States for shelter or ornament	hard tough wood of an elm tree; used for e.g. implements and furniture