Amanita vs fungus genus

Amanita and fungus genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Amanita	Yes	No	No	No
fungus genus	Yes	No	No	No

As nouns, fungus genus is a hypernym of Amanita; that is, fungus genus is a word with a broader meaning than Amanita:

Amanita: genus of widely distributed agarics that have white spores and are poisonous with few exceptions
fungus genus: includes lichen genera

Amanita (noun)	fungus genus (noun)
genus of widely distributed agarics that have white spores and are poisonous with few exceptions	includes lichen genera