oyster mushroom vs agaric

oyster mushroom and agaric both are nouns.

Word	Noun	Adjective	Verb	Adverb
oyster mushroom	Yes	No	No	No
agaric	Yes	No	No	No

As nouns, agaric is a hypernym of oyster mushroom; that is, agaric is a word with a broader meaning than oyster mushroom:

oyster mushroom: edible agaric with a soft greyish cap growing in shelving masses on dead wood
agaric: a saprophytic fungus of the order Agaricales having an umbrellalike cap with gills on the underside

oyster mushroom (noun)	agaric (noun)
edible agaric with a soft greyish cap growing in shelving masses on dead wood	a saprophytic fungus of the order Agaricales having an umbrellalike cap with gills on the underside
	fungus used in the preparation of punk for fuses