Oregon oak vs Oregon white oak

Oregon oak and Oregon white oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oregon oak	Yes	No	No	No
Oregon white oak	Yes	No	No	No

As nouns, Oregon oak and Oregon white oak are synonyms defined as:

Oregon oak and Oregon white oak: small deciduous tree of western North America with crooked branches and pale grey bark

Other synonyms of Oregon oak include Garry oak, Quercus garryana.

Oregon oak (noun)	Oregon white oak (noun)
small deciduous tree of western North America with crooked branches and pale grey bark	small deciduous tree of western North America with crooked branches and pale grey bark