family Brassicaceae vs genus Sisymbrium

family Brassicaceae and genus Sisymbrium both are nouns.

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

family Brassicaceae (noun)	genus Sisymbrium (noun)
a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives	genus of Old World annual or biennial or perennial herbs with racemose flowers; many are considered to be weeds