Quercus ellipsoidalis vs northern pin oak

Quercus ellipsoidalis and northern pin oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
Quercus ellipsoidalis	Yes	No	No	No
northern pin oak	Yes	No	No	No

As nouns, Quercus ellipsoidalis and northern pin oak are synonyms defined as:

Quercus ellipsoidalis and northern pin oak: small to medium deciduous oak of east central North America; leaves have sharply pointed lobes

Other synonyms of Quercus ellipsoidalis include jack oak.

Quercus ellipsoidalis (noun)	northern pin oak (noun)
small to medium deciduous oak of east central North America; leaves have sharply pointed lobes	small to medium deciduous oak of east central North America; leaves have sharply pointed lobes