Chinese cork oak vs oak tree

Chinese cork oak and oak tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chinese cork oak	Yes	No	No	No
oak tree	Yes	No	No	No

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

Chinese cork oak: medium to large deciduous tree of China, Japan, and Korea having thick corky bark
oak tree: a deciduous tree of the genus Quercus; has acorns and lobed leaves

Other hypernyms of Chinese cork oak include oak.

Chinese cork oak (noun)	oak tree (noun)
medium to large deciduous tree of China, Japan, and Korea having thick corky bark	a deciduous tree of the genus Quercus; has acorns and lobed leaves