Oriental black mushroom vs shiitake

Oriental black mushroom and shiitake both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oriental black mushroom	Yes	No	No	No
shiitake	Yes	No	No	No

As nouns, Oriental black mushroom and shiitake are synonyms defined as:

Oriental black mushroom and shiitake: edible east Asian mushroom having a golden or dark brown to blackish cap and an inedible stipe

Other synonyms of Oriental black mushroom include Chinese black mushroom, golden oak mushroom, Lentinus edodes, shiitake mushroom.

Oriental black mushroom (noun)	shiitake (noun)
edible east Asian mushroom having a golden or dark brown to blackish cap and an inedible stipe	edible east Asian mushroom having a golden or dark brown to blackish cap and an inedible stipe