family Brassicaceae vs genus Sinapis

family Brassicaceae and genus Sinapis both are nouns.

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

family Brassicaceae (noun)	genus Sinapis (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	small genus of Old World herbs usually included in genus Brassica