Volvariaceae vs fungus family

Volvariaceae and fungus family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Volvariaceae	Yes	No	No	No
fungus family	Yes	No	No	No

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

Volvariaceae (noun)	fungus family (noun)
a family of fungi belonging to the order Agaricales	includes lichen families