holly-leaved oak vs Quercus ilex

holly-leaved oak and Quercus ilex both are nouns.

Word	Noun	Adjective	Verb	Adverb
holly-leaved oak	Yes	No	No	No
Quercus ilex	Yes	No	No	No

As nouns, holly-leaved oak and Quercus ilex are synonyms defined as:

holly-leaved oak and Quercus ilex: evergreen oak of southern Europe having leaves somewhat resembling those of holly; yields a hard wood

Other synonyms of holly-leaved oak include evergreen oak, holm oak, holm tree.

holly-leaved oak (noun)	Quercus ilex (noun)
evergreen oak of southern Europe having leaves somewhat resembling those of holly; yields a hard wood	evergreen oak of southern Europe having leaves somewhat resembling those of holly; yields a hard wood