Juglans regia vs Circassian walnut

Juglans regia and Circassian walnut both are nouns.

Word	Noun	Adjective	Verb	Adverb
Juglans regia	Yes	No	No	No
Circassian walnut	Yes	No	No	No

As nouns, Juglans regia and Circassian walnut are synonyms defined as:

Juglans regia and Circassian walnut: Eurasian walnut valued for its large edible nut and its hard richly figured wood; widely cultivated

Other synonyms of Juglans regia include English walnut, English walnut tree, Persian walnut.

Juglans regia (noun)	Circassian walnut (noun)
Eurasian walnut valued for its large edible nut and its hard richly figured wood; widely cultivated	Eurasian walnut valued for its large edible nut and its hard richly figured wood; widely cultivated