genus Prunella vs bird genus

genus Prunella and bird genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Prunella	Yes	No	No	No
bird genus	Yes	No	No	No

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

genus Prunella (noun)	bird genus (noun)
type genus of the Prunellidae	a genus of birds
small genus of perennial mostly Eurasian having terminal spikes of small purplish or white flowers