Juglans californica vs California black walnut

Juglans californica and California black walnut both are nouns.

Word	Noun	Adjective	Verb	Adverb
Juglans californica	Yes	No	No	No
California black walnut	Yes	No	No	No

As nouns, Juglans californica and California black walnut are synonyms defined as:

Juglans californica and California black walnut: medium-sized tree with somewhat aromatic compound leaves and edible nuts

Juglans californica (noun)	California black walnut (noun)
medium-sized tree with somewhat aromatic compound leaves and edible nuts	medium-sized tree with somewhat aromatic compound leaves and edible nuts