family Brassicaceae vs genus Biscutella

family Brassicaceae and genus Biscutella both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Brassicaceae	Yes	No	No	No
genus Biscutella	Yes	No	No	No

family Brassicaceae (noun)	genus Biscutella (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	genus of Eurasian herbs and small shrubs: buckler mustard