Quercus lyrata vs oak tree

Quercus lyrata and oak tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Quercus lyrata	Yes	No	No	No
oak tree	Yes	No	No	No

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

Quercus lyrata: medium-large deciduous timber tree of central and southern United States; acorns deeply immersed in the cup and mature in first year
oak tree: a deciduous tree of the genus Quercus; has acorns and lobed leaves

Other hypernyms of Quercus lyrata include oak.

Quercus lyrata (noun)	oak tree (noun)
medium-large deciduous timber tree of central and southern United States; acorns deeply immersed in the cup and mature in first year	a deciduous tree of the genus Quercus; has acorns and lobed leaves