Japanese oak vs Quercus mongolica

Japanese oak and Quercus mongolica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese oak	Yes	No	No	No
Quercus mongolica	Yes	No	No	No

As nouns, Japanese oak and Quercus mongolica are synonyms defined as:

Japanese oak and Quercus mongolica: oak with moderately light fine-grained wood; Japan

Other synonyms of Japanese oak include Quercus grosseserrata.

Japanese oak (noun)	Quercus mongolica (noun)
small evergreen tree of China and Japan	oak with moderately light fine-grained wood; Japan
oak with moderately light fine-grained wood; Japan