genus Arabis vs family Brassicaceae

genus Arabis and family Brassicaceae both are nouns.

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

genus Arabis (noun)	family Brassicaceae (noun)
annual to perennial woody herbs of temperate North America, Europe and Asia: rockcress	a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives