Amanita caesarea vs royal agaric

Amanita caesarea and royal agaric both are nouns.

Word	Noun	Adjective	Verb	Adverb
Amanita caesarea	Yes	No	No	No
royal agaric	Yes	No	No	No

As nouns, Amanita caesarea and royal agaric are synonyms defined as:

Amanita caesarea and royal agaric: widely distributed edible mushroom resembling the fly agaric

Other synonyms of Amanita caesarea include Caesar's agaric.

Amanita caesarea (noun)	royal agaric (noun)
widely distributed edible mushroom resembling the fly agaric	widely distributed edible mushroom resembling the fly agaric