Japan bittersweet vs oriental bittersweet

Japan bittersweet and oriental bittersweet both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japan bittersweet	Yes	No	No	No
oriental bittersweet	Yes	No	No	No

As nouns, Japan bittersweet and oriental bittersweet are synonyms defined as:

Japan bittersweet and oriental bittersweet: ornamental Asiatic vine with showy orange-yellow fruit with a scarlet aril; naturalized in North America

Other synonyms of Japan bittersweet include Celastric articulatus, Celastrus orbiculatus, Japanese bittersweet.

Japan bittersweet (noun)	oriental bittersweet (noun)
ornamental Asiatic vine with showy orange-yellow fruit with a scarlet aril; naturalized in North America	ornamental Asiatic vine with showy orange-yellow fruit with a scarlet aril; naturalized in North America