Quercus kelloggii vs California black oak

Quercus kelloggii and California black oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
Quercus kelloggii	Yes	No	No	No
California black oak	Yes	No	No	No

As nouns, Quercus kelloggii and California black oak are synonyms defined as:

Quercus kelloggii and California black oak: large deciduous tree of the Pacific coast having deeply parted bristle-tipped leaves

Quercus kelloggii (noun)	California black oak (noun)
large deciduous tree of the Pacific coast having deeply parted bristle-tipped leaves	large deciduous tree of the Pacific coast having deeply parted bristle-tipped leaves