Quercus robur vs English oak

Quercus robur and English oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
Quercus robur	Yes	No	No	No
English oak	Yes	No	No	No

As nouns, Quercus robur and English oak are synonyms defined as:

Quercus robur and English oak: medium to large deciduous European oak having smooth leaves with rounded lobes; yields hard strong light-colored wood

Other synonyms of Quercus robur include common oak, pedunculate oak.

Quercus robur (noun)	English oak (noun)
medium to large deciduous European oak having smooth leaves with rounded lobes; yields hard strong light-colored wood	medium to large deciduous European oak having smooth leaves with rounded lobes; yields hard strong light-colored wood