Chinese elm vs elm tree

Chinese elm and elm tree both are nouns.

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

As nouns, elm tree is a hypernym of Chinese elm; that is, elm tree 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 tree: any of various trees of the genus Ulmus: important timber or shade trees

Other hypernyms of Chinese elm include elm.

As nouns, elm tree is a hypernym of Chinese elm; that is, elm tree 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 tree: any of various trees of the genus Ulmus: important timber or shade trees

Other hypernyms of Chinese elm include elm.

Chinese elm (noun)	elm tree (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