Caesar's agaric vs royal agaric

Caesar's agaric and royal agaric both are nouns.

Word	Noun	Adjective	Verb	Adverb
Caesar's agaric	Yes	No	No	No
royal agaric	Yes	No	No	No

As nouns, Caesar's agaric and royal agaric are synonyms defined as:

Caesar's agaric and royal agaric: widely distributed edible mushroom resembling the fly agaric

Other synonyms of Caesar's agaric include Amanita caesarea.

Caesar's agaric (noun)	royal agaric (noun)
widely distributed edible mushroom resembling the fly agaric	widely distributed edible mushroom resembling the fly agaric