oyster fungus vs Pleurotus ostreatus

oyster fungus and Pleurotus ostreatus both are nouns.

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

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

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

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

oyster fungus (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