oyster mushroom vs Pleurotus ostreatus

oyster mushroom and Pleurotus ostreatus both are nouns.

Word	Noun	Adjective	Verb	Adverb
oyster mushroom	Yes	No	No	No
Pleurotus ostreatus	Yes	No	No	No

As nouns, oyster mushroom and Pleurotus ostreatus are synonyms defined as:

oyster mushroom and Pleurotus ostreatus: edible agaric with a soft greyish cap growing in shelving masses on dead wood

Other synonyms of oyster mushroom include oyster agaric, oyster fungus.

oyster mushroom (noun)	Pleurotus ostreatus (noun)
edible agaric with a soft greyish cap growing in shelving masses on dead wood	edible agaric with a soft greyish cap growing in shelving masses on dead wood