genus Fomes vs fungus genus

genus Fomes and fungus genus both are nouns.

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

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

genus Fomes: genus of bracket fungi forming corky or woody perennial shelflike sporophores often of large size; includes some that cause destructive heartrot in trees
fungus genus: includes lichen genera

genus Fomes (noun)	fungus genus (noun)
genus of bracket fungi forming corky or woody perennial shelflike sporophores often of large size; includes some that cause destructive heartrot in trees	includes lichen genera